The current that flows is determined by the potential difference across the conductor and the resistance of the conductor (Ohm s law): V = IR P = VI

Size: px
Start display at page:

Download "The current that flows is determined by the potential difference across the conductor and the resistance of the conductor (Ohm s law): V = IR P = VI"

Transcription

1 PHYS1000 DC electric circuits 1 Electric circuits Electric current Charge can move freely in a conductor if an electric field is present; the moving charge is an electric current (SI unit is the ampere (A), often shortened to amps). We use the potential difference or voltage across the conductor to characterize the electric field (since V = E x) The current that flows is determined by the potential difference across the conductor and the resistance of the conductor (Ohm s law): The SI unit of resistance is the ohm (Ω). As current flows through a resistance, energy is lost: V = IR P = VI If the current is constant (which also means it doesn t change direction), the current is called a direct current or DC. What is an electric circuit? To maintain a steady electric current, the moving charge needs to be able to return to its starting location a complete circuit must be present. Since energy lost as the charge moves, this energy must be replaced by a power supply. The main ways to produce an electric current are generators using electromagnetic induction, and chemical batteries. The exact type of power supply is not important, how much energy is supplied is. We measure this energy by the potential difference provided by the power supply also called the voltage of the power supply. Note that the potential difference across a resistance is a potential drop, or a reduction in energy. The potential difference across a power supply is a potential rise a gain in energy. For a steady current, if we go around a complete circuit, the total energy supplied is equal to the total energy lost: V supply = V losses Usually, a simple circuit will only contain a single power supply. positive, and all potential drops negative, we can write: If we make all potential rises V = 0 around any closed circuit.

2 PHYS1000 DC electric circuits 2 Circuit diagrams An easy way to describe an electric circuit is with a circuit diagram a drawing showing the circuit. Standard symbols are used for the various components in the circuit, and the conductors (wires) joining them together are drawn as lines. Circuit symbols: power supply A DC power supply can be drawn in a number of different ways (we ll use the one on the left): +9 V + 9 V Resistors If the resistance of a component of an electric circuit is its main electrical property, we can call it a resistor. Why do we want to add resistance to a circuit? A component might perform some useful function, but its main electrical property is resistance we can represent it with a resistor. (For example, a heating element, or a light bulb.) We can use a resistor to control the current in a circuit. Once we put a resistor in a circuit, its resistance is so much larger than the resistance of the wires in the circuit, and we can assume that the resistance of the wires is zero. Circuit symbols: resistor Example: a 1.0 kω resistor connected to a 12 V power supply: 12 V 1.0 kω

3 PHYS1000 DC electric circuits 3 Series & parallel circuits Multiple components in a circuit can either be connected in series with each other R R 1 2 R3 in parallel with each other R 1 R 2 R 3 Series circuits Example: a 1.0 kω and a 2.0 kω resistor connected in series with a 12 V power supply: 12 V 1.0 kω 2.0 kω Note that as the current flows from A to B, power is lost in each resistor, so V AB = V 1 + V 2

4 PHYS1000 DC electric circuits 4 the same current flows through all the resistors the combined resistance of both resistors is I A = I 1 = I 2 = I B R T = R 1 + R 2 Example: a 1.0 kω and a 2.0 kω resistor connected in parallel with a 12 V power supply: 12 V 1.0 kω 2.0 kω Note that all the resistors connect the same two points in the circuit together, so they must all have the same potential difference across them V AB = V 1 = V 2 the current at A splits up to flow through all of the resistors the combined resistance of both resistors is I A = I 1 + I 2 = I B 1 R T = 1 R R 2 Measuring currents and voltages We use ammeters and voltmeters to measure current and potential difference. ammeter The current to be measured must flow through the meter connect in series A

5 PHYS1000 DC electric circuits 5 voltmeter We want to measure the potential difference across two points connect in parallel across these two points V A B A multimeter is a convenient device that can measure either voltage or current (and resistance as well). Capacitors ADVANCED Two parallel plates with positive and negative charges equal in magnitude can be used to store electrical energy. This is called a capacitor. This energy can be used as a power supply in a circuit. The stored energy depends on the charge and the capacitance (measured in farads (F)). Q = CV Since the potential difference between the two plates depends on the charge on the plates, the voltage across the capacitor will fall as current flows from it as the capacitor discharges. How quickly the voltage falls depends on how much current flows, which depends on the resistance in the circuit. V = V 0 exp t/rc where R is the resistance in the circuit and C is the capacitance of the capacitor. The quantity RC is called the time constant, and is usually written as τ. Similarly, it takes time to charge a capacitor: This can be used to measure time in DC circuits. V = V 0 (1 exp t/τ) When the capacitor is fully charged or discharged, no current will flow. Circuit symbols: capacitor

6 PHYS1000 DC electric circuits 6 AC circuits EXTRA Another common type of electric current is alternating current, or AC. In an AC circuit, the current varies sinusoidally, and flows first in one direction, and then the other. If a suitable average voltage and current are used for AC, Ohm s Law can still be used for circuits which only contain resistors.

Tutorial 12 Solutions

Tutorial 12 Solutions PHYS000 Tutorial 2 solutions Tutorial 2 Solutions. Two resistors, of 00 Ω and 200 Ω, are connected in series to a 6.0 V DC power supply. (a) Draw a circuit diagram. 6 V 00 Ω 200 Ω (b) What is the total

More information

1) 10. V 2) 20. V 3) 110 V 4) 220 V

1) 10. V 2) 20. V 3) 110 V 4) 220 V 1. The diagram below represents an electric circuit consisting of a 12-volt battery, a 3.0-ohm resistor, R 1, and a variable resistor, R 2. 3. What is the total resistance of the circuit 1) 6.6 Ω 2) 10

More information

PHY 101 Lab 7 on Electric circuits: Direct current circuits Your name: Other team members:

PHY 101 Lab 7 on Electric circuits: Direct current circuits Your name: Other team members: PHY 101 Lab 7 on Electric circuits: Direct current circuits Your name: Other team members: Goals: To explore the basic principles of electric circuits, and how to measure them. Materials: Electrical resistors

More information

National Physics Homework. Section 1 : Circuits. Name..

National Physics Homework. Section 1 : Circuits. Name.. National Physics Homework Section 1 : Circuits Name.. Energy Homework 1 Charges 1. a) Complete the following: Current is equal to the number of of flowing every (1) b) What is the difference between d.c

More information

Physics 9 Fall 2009 Homework 6 - Solutions

Physics 9 Fall 2009 Homework 6 - Solutions . Chapter 32 - Exercise 8. Physics 9 Fall 29 Homework 6 - s How much power is dissipated by each resistor in the figure? First, let s figure out the current in the circuit. Since the two resistors are

More information

Laboratory 6: Parallel and Series Resistors

Laboratory 6: Parallel and Series Resistors Phys 112L Spring 2015 Laboratory 6: Parallel and Series Resistors This laboratory investigates resistors connected in series and parallel; these arrangements are common in many electrical devices. 1 Series

More information

Kirchhoff s Voltage Law and RC Circuits

Kirchhoff s Voltage Law and RC Circuits Kirchhoff s oltage Law and RC Circuits Apparatus 2 1.5 batteries 2 battery holders DC Power Supply 1 multimeter 1 capacitance meter 2 voltage probes 1 long bulb and 1 round bulb 2 sockets 1 set of alligator

More information

16.3 Ohm s Law / Energy and Power / Electric Meters

16.3 Ohm s Law / Energy and Power / Electric Meters 16.3 Ohm s Law / Energy and Power / Electric Meters Voltage Within a battery, a chemical reaction occurs that transfers electrons from one terminal to another terminal. This potential difference across

More information

Lecture PowerPoints. Chapter 19 Physics: Principles with Applications, 7th edition Giancoli

Lecture PowerPoints. Chapter 19 Physics: Principles with Applications, 7th edition Giancoli Lecture PowerPoints Chapter 19 Physics: Principles with Applications, 7th edition Giancoli This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching

More information

12/14/2007. Electricity LO:

12/14/2007. Electricity LO: Electricity LO: Basic ideas 12/14/2007 Electric current is when electrons start to flow around a circuit. We use an to measure it and it is measured in. Potential difference (also called ) is how big the

More information

How many laws are named after Kirchhoff?

How many laws are named after Kirchhoff? Chapter 32. Fundamentals of Circuits Surprising as it may seem, the power of a computer is achieved simply by the controlled flow of charges through tiny wires and circuit elements. Chapter Goal: To understand

More information

Unit 7: Electric Circuits

Unit 7: Electric Circuits Multiple Choice Portion 1. The diagram below shows part of an electrical circuit. Unit 7: Electric Circuits 4. A 12 V battery supplies a 5.0 A current to two light bulbs as shown below. What are the magnitude

More information

Exam 2--PHYS 102--S14

Exam 2--PHYS 102--S14 Class: Date: Exam 2--PHYS 02--S4 Multiple Choice Identify the choice that best completes the statement or answers the question.. Consider this circuit. What is the equivalent capacitance? 5. Each plate

More information

Ch 18 Direct Current Circuits. concept #2, 5, 10, 12, 13, 23 Problems #1, 5, 6, 11, 17, 25, 31, 32, 33, 35, 36, 37

Ch 18 Direct Current Circuits. concept #2, 5, 10, 12, 13, 23 Problems #1, 5, 6, 11, 17, 25, 31, 32, 33, 35, 36, 37 Ch 18 Direct Current Circuits concept #2, 5, 10, 12, 13, 23 Problems #1, 5, 6, 11, 17, 25, 31, 32, 33, 35, 36, 37 currents are maintained by a source of emf (battery, generator) Sources of emf act as charge

More information

Circuits. Page The diagram below represents a series circuit containing three resistors.

Circuits. Page The diagram below represents a series circuit containing three resistors. Name: Circuits Date: 1. Which circuit segment has an equivalent resistance of 6 ohms? 4. The diagram below represents a series circuit containing three resistors. 2. Base your answer to the following question

More information

Chapter 1. Components, Quantities, and Units. Introduction

Chapter 1. Components, Quantities, and Units. Introduction Chapter 1 Components, Quantities, and Units Introduction This chapter will give you a preview of the types of things you will study throughout this book 1 Objectives Recognize common electrical components

More information

Electric Circuits Review

Electric Circuits Review Electric Circuits Review 1. Which of the following statements are true about electric current? Circle all that apply. a. Electric current is measured in units of Amperes. b. Electric current is defined

More information

Students will need about 30 minutes to complete these constructed response tasks.

Students will need about 30 minutes to complete these constructed response tasks. Electric Title of Circuits Concept Constructed Response Teacher Guide Students will need about 30 minutes to complete these constructed response tasks. Objectives assessed: Understand the functions of

More information

Capacitance, Resistance, DC Circuits

Capacitance, Resistance, DC Circuits This test covers capacitance, electrical current, resistance, emf, electrical power, Ohm s Law, Kirchhoff s Rules, and RC Circuits, with some problems requiring a knowledge of basic calculus. Part I. Multiple

More information

PHYSICS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits

PHYSICS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits PHYSCS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits This experiment is designed to investigate the relationship between current and potential in simple series

More information

Chapter 11- Electricity

Chapter 11- Electricity Chapter 11- Electricity Course Content Definition of Electricity Circuit Diagrams Series and Parallel Circuits Calculating total resistances Measurement of Electricity Ammeters and Voltmeters Ohm s Law

More information

Lab #4 Capacitors and Inductors. Capacitor and Inductor Transient Response

Lab #4 Capacitors and Inductors. Capacitor and Inductor Transient Response Capacitor and Inductor Transient Response Capacitor Theory Like resistors, capacitors are also basic circuit elements. Capacitors come in a seemingly endless variety of shapes and sizes, and they can all

More information

B The letter "R" is the symbol for: 1. impedance 2. resistance 3. reluctance 4. reactance. B Voltage drop means:

B The letter R is the symbol for: 1. impedance 2. resistance 3. reluctance 4. reactance. B Voltage drop means: CHAPTER 3 B-005-02-07 The letter "R" is the symbol for: 1. impedance 2. resistance 3. reluctance 4. reactance B-005-02-09 Voltage drop means: 1. voltage developed across the terminals of a component 2.

More information

DC Circuits: Ch 19. Resistors in Series 6/1/2016

DC Circuits: Ch 19. Resistors in Series 6/1/2016 DC Circuits: Ch 19 Voltage Starts out at highest point at + end of battery Voltage drops across lightbulbs and other sources of resistance. Voltage increases again at battery. I The following circuit uses

More information

Experiment 3 ~ Ohm's Law, Measurement of Voltage, Current and Resistance

Experiment 3 ~ Ohm's Law, Measurement of Voltage, Current and Resistance Experiment 3 ~ Ohm's Law, Measurement of Voltage, Current and Resistance Objective: In this experiment you will learn to use the multi-meter to measure voltage, current and resistance. Equipment: Bread

More information

Analog and Digital Meters

Analog and Digital Meters Analog and Digital Meters Devices and Measurements Objective At the conclusion of this presentation the student will describe and identify: Safety precautions when using test equipment Analog Multimeters

More information

Figure 1: Capacitor circuit

Figure 1: Capacitor circuit Capacitors INTRODUCTION The basic function of a capacitor 1 is to store charge and thereby electrical energy. This energy can be retrieved at a later time for a variety of uses. Often, multiple capacitors

More information

Resistors in Series and Parallel

Resistors in Series and Parallel Resistors in Series and Parallel INTRODUCTION Direct current (DC) circuits are characterized by the quantities current, voltage and resistance. Current is the rate of flow of charge. The SI unit is the

More information

Ch. 20 Electric Circuits

Ch. 20 Electric Circuits Ch. 0 Electric Circuits 0. Electromotive Force Every electronic device depends on circuits. Electrical energy is transferred from a power source, such as a battery, to a device, say a light bulb. Conducting

More information

OHM'S LAW. Objective To study the relationship between the electrical current flowing through a circuit element and the voltage applied.

OHM'S LAW. Objective To study the relationship between the electrical current flowing through a circuit element and the voltage applied. OHM'S LAW Objective To study the relationship between the electrical current flowing through a circuit element and the voltage applied. Equipment Power supply, 10 ohm resistor, 50 ohm resistor, automotive

More information

Chapter 19. Electric Circuits

Chapter 19. Electric Circuits Chapter 9 Electric Circuits Kirchhoff s Rules How can one deal with a complicated circuit like this? à Use Kirchhoff s rules: * Junction rule * Loop rule Kirchhoff s Rules The junction rule states that

More information

Electricity & Electronics 8: Capacitors in Circuits

Electricity & Electronics 8: Capacitors in Circuits Electricity & Electronics 8: Capacitors in Circuits Capacitors in Circuits IM This unit considers, in more detail, the charging and discharging of capacitors. It then investigates how capacitors behave

More information

THE BREADBOARD; DC POWER SUPPLY; RESISTANCE OF METERS; NODE VOLTAGES AND EQUIVALENT RESISTANCE; THÉVENIN EQUIVALENT CIRCUIT

THE BREADBOARD; DC POWER SUPPLY; RESISTANCE OF METERS; NODE VOLTAGES AND EQUIVALENT RESISTANCE; THÉVENIN EQUIVALENT CIRCUIT THE BREADBOARD; DC POWER SUPPLY; RESISTANCE OF METERS; NODE VOLTAGES AND EQUIVALENT RESISTANCE; THÉVENIN EQUIVALENT CIRCUIT YOUR NAME LAB MEETING TIME Reference: C.W. Alexander and M.N.O Sadiku, Fundamentals

More information

Q1. (a) The diagram shows the voltage-current graphs for three different electrical components.

Q1. (a) The diagram shows the voltage-current graphs for three different electrical components. Q. (a) The diagram shows the voltage-current graphs for three different electrical components. Which one of the components A, B or C could be a 3 volt filament lamp? Explain the reason for your choice...................

More information

How Does it Flow? Electricity, Circuits, and Motors

How Does it Flow? Electricity, Circuits, and Motors How Does it Flow? Electricity, Circuits, and Motors Introduction In this lab, we will investigate the behavior of some direct current (DC) electrical circuits. These circuits are the same ones that move

More information

Gravitational Potential Energy

Gravitational Potential Energy Gravitational Potential Energy When in the presence of a gravitational field, a mass will have gravitational potential energy due to its position relative to the source of the force PE = If the object

More information

ELECTRICITY AND ELECTRIC CIRCUITS

ELECTRICITY AND ELECTRIC CIRCUITS ELECTRICITY AND ELECTRIC CIRCUITS Electric Current - the term used to describe the movement, or flow, of electric charges from one place to another. Electric - a controlled path through which electric

More information

DC Circuits: Ch 32. Resistors in Series 6/3/2013

DC Circuits: Ch 32. Resistors in Series 6/3/2013 DC Circuits: Ch 32 Voltage Starts out at highest point at + end of battery Voltage drops across lightbulbs and other sources of resistance. Voltage increases again at battery. I The following circuit uses

More information

Chapter 19. Electric Potential Energy and the Electric Potential

Chapter 19. Electric Potential Energy and the Electric Potential Chapter 19 Electric Potential Energy and the Electric Potential 19.5 Capacitors and Dielectrics A parallel plate capacitor consists of two metal plates, one carrying charge +q and the other carrying charge

More information

= (0.400 A) (4.80 V) = 1.92 W = (0.400 A) (7.20 V) = 2.88 W

= (0.400 A) (4.80 V) = 1.92 W = (0.400 A) (7.20 V) = 2.88 W Physics 2220 Module 06 Homework 0. What are the magnitude and direction of the current in the 8 Ω resister in the figure? Assume the current is moving clockwise. Then use Kirchhoff's second rule: 3.00

More information

Lecture Notes (Simple Circuits)

Lecture Notes (Simple Circuits) Lecture Notes (Simple Circuits) Intro: - it is very useful to consider an analogy such as a water model when considering the flow of electric charge - the water mechanical pump is the equivalent of the

More information

Physics Worksheet Electric Circuits Section: Name: Series Circuits

Physics Worksheet Electric Circuits Section: Name: Series Circuits Do Now: (1) What is electric circuit? (2) Convert the following picture into schematic diagram. Series Circuits 4. Label every component of the circuit; identify each of the voltage and current. 5. Relation

More information

SERIES AND PARALLEL RESISTORS

SERIES AND PARALLEL RESISTORS Lab 3. SERIES AND PARALLEL RESISTORS 3.1. Problem How do you measure resistance, voltage, and current in a resistor? How are these quantities related? What is the difference between a series circuit and

More information

Direct Current Circuits

Direct Current Circuits Phys 2212L LAB 4 Direct Current Circuits Purpose In this laboratory, we will set up the three basic types of electric circuits: a series, a parallel and a combination circuit. We will use Ohm s Law and

More information

Capacitors. We charge a capacitor by connecting the two plates to a potential difference, such as a battery:

Capacitors. We charge a capacitor by connecting the two plates to a potential difference, such as a battery: RC Circuits PHYS 1112L Capacitors A capacitor is an electrical component that stores charge. The simplest capacitor is just two charged metal plates separated by a non-conducting material: In the diagram

More information

PH102 Capacitors Lab Q V

PH102 Capacitors Lab Q V Group Members: Introduction In this experiment we will determine how voltages are distributed in capacitor circuits and explore series and parallel combinations of capacitors. The capacitance is a measure

More information

IEEE s Hands on Practical Electronics (HOPE) Lesson 4: Capacitance

IEEE s Hands on Practical Electronics (HOPE) Lesson 4: Capacitance IEEE s Hands on Practical Electronics (HOPE) Lesson 4: Capacitance Last Week Ohm s Law Kirchoff s Voltage and Current Laws KVL: Voltage around a loop sums to zero. KCL: Current into a node equals current

More information

EMF and Terminal Voltage Resistors in Series and Parallel Kirchhoff s Rules EMFs in Series and Parallel; Charging a Battery Circuits with Capacitors

EMF and Terminal Voltage Resistors in Series and Parallel Kirchhoff s Rules EMFs in Series and Parallel; Charging a Battery Circuits with Capacitors Chapter 19 DC Electrical Circuits Topics in Chapter 19 EMF and Terminal Voltage Resistors in Series and Parallel Kirchhoff s Rules EMFs in Series and Parallel; Charging a Battery Circuits with Capacitors

More information

Clicker Question. Which of the two arrangements shown has the smaller equivalent resistance between points a and b?

Clicker Question. Which of the two arrangements shown has the smaller equivalent resistance between points a and b? Which of the two arrangements shown has the smaller equivalent resistance between points a and b? A. the series arrangement B. the parallel arrangement C. The equivalent resistance is the same for both

More information

1. Solving series circuit problems

1. Solving series circuit problems Name: Skill Sheet 20. Parallel and Series Circuits There are two major types of electrical circuits: series and parallel. In a series circuit, current follows only one path. In a parallel circuit, the

More information

Series Circuit. Types of Electric Circuits. Mini-Lab. Mini-Lab. Schematic Diagrams Symbols: Battery. Open Switch. Resistor. Closed Switch.

Series Circuit. Types of Electric Circuits. Mini-Lab. Mini-Lab. Schematic Diagrams Symbols: Battery. Open Switch. Resistor. Closed Switch. Schematic diagram: A diagram of an electric circuit Straight Lines Only! Schematic Diagrams Symbols: Battery Resistor Bulb Open Switch Closed Switch Types of Electric Circuits Series Circuit 2 types of

More information

Fig. 1 Analogue Multimeter Fig.2 Digital Multimeter

Fig. 1 Analogue Multimeter Fig.2 Digital Multimeter ELECTRICAL INSTRUMENT AND MEASUREMENT Electrical measuring instruments are devices used to measure electrical quantities such as electric current, voltage, resistance, electrical power and energy. MULTIMETERS

More information

Name: Lab Partner: Section:

Name: Lab Partner: Section: Chapter 6 Capacitors and RC Circuits Name: Lab Partner: Section: 6.1 Purpose The purpose of this experiment is to investigate the physics of capacitors in circuits. The charging and discharging of a capacitor

More information

Electronics. Basic Concepts. Yrd. Doç. Dr. Aytaç GÖREN Yrd. Doç. Dr. Levent ÇETİN

Electronics. Basic Concepts. Yrd. Doç. Dr. Aytaç GÖREN Yrd. Doç. Dr. Levent ÇETİN Electronics Basic Concepts Electric charge Ordinary matter is made up of atoms which have positively charged nuclei and negatively charged electrons surrounding them. Charge is quantized as the subtraction

More information

AP* Electric Circuits Free Response Questions

AP* Electric Circuits Free Response Questions AP* Electric Circuits Free Response Questions 1996 Q4 (15 points) A student is provided with a 12.0-V battery of negligible internal resistance and four resistors with the following resistances: 100 Ω,

More information

Circuit Elements Read: Chapter 20 Capacitors

Circuit Elements Read: Chapter 20 Capacitors Read: Chapter 20 Capacitors capacitor circuit symbol A capacitor, in its simplest form, consists of two conducting plates separated by a small gap. Current cannot flow through a capacitor. A capacitor

More information

Experiment NO.3 Series and parallel connection

Experiment NO.3 Series and parallel connection Experiment NO.3 Series and parallel connection Object To study the properties of series and parallel connection. Apparatus 1. DC circuit training system 2. Set of wires. 3. DC Power supply 4. Digital A.V.O.

More information

Chapter 7 Direct-Current Circuits

Chapter 7 Direct-Current Circuits Chapter 7 Direct-Current Circuits 7. Introduction...7-7. Electromotive Force...7-3 7.3 Resistors in Series and in Parallel...7-5 7.4 Kirchhoff s Circuit Rules...7-7 7.5 Voltage-Current Measurements...7-9

More information

More Concepts. I = dq. Current is the rate of flow of charge around a circuit.

More Concepts. I = dq. Current is the rate of flow of charge around a circuit. RC Circuits In this presentation, circuits with multiple batteries, resistors and capacitors will be reduced to an equivalent system with a single battery, a single resistor, and a single capacitor. Kirchoff's

More information

Series and Parallel Circuits

Series and Parallel Circuits Series and Parallel Circuits Components in a circuit can be connected in series or parallel. A series arrangement of components is where they are inline with each other, i.e. connected end-to-end. A parallel

More information

Chapter 2. Voltage, Current, and Resistance. Objectives

Chapter 2. Voltage, Current, and Resistance. Objectives Chapter 2 Voltage, Current, and Resistance Objectives Describe the basic structure of an atom Explain the concept of electrical charge Define voltage and discuss its characteristics Define current and

More information

16C Electric Circuits

16C Electric Circuits Electric Circuits Investigation 16C 16C Electric Circuits What are the different types of circuits? A simple electric circuit contains one electrical device, a battery, and a switch. Flashlights use this

More information

Voltage, Current, and Resistance

Voltage, Current, and Resistance Voltage, Current and Resistance 1 Voltage, Current, and Resistance Overview: In this lab, you will study the relationship between the voltage applied across a conductor and the current flowing through

More information

Exercise 2: Circuit Current

Exercise 2: Circuit Current Exercise 2: Circuit Current EXERCISE OBJECTIVE When you have completed this exercise, you will be able to describe and measure current by using a simple circuit. You will verify your results with a multimeter.

More information

Lab 10: Macroscopic View of RC Circuits

Lab 10: Macroscopic View of RC Circuits OBJECTIVES In this lab you will Use a voltmeter and ammeter to analyze a circuit Determine if components of the circuit are ohmic or nonohmic Calculate the internal resistance of a battery Measure the

More information

LAB 4: KIRCHOFF S CIRCUIT RULES (Reference: Physics Laboratory Experiments - J. D. Wilson, DC Heath & Co.)

LAB 4: KIRCHOFF S CIRCUIT RULES (Reference: Physics Laboratory Experiments - J. D. Wilson, DC Heath & Co.) LAB 4: KIRCHOFF S CIRCUIT RULES (Reference: Physics Laboratory Experiments - J. D. Wilson, DC Heath & Co.) Objectives: Distinguish between circuit branches and junctions Apply Kirchoff s rules to multiloop

More information

1. What is the current in a circuit if 15 coulombs of electric charge move past a given point in 3 seconds? (1) 5 A (3) 18 A (2) 12 A (4) 45 A

1. What is the current in a circuit if 15 coulombs of electric charge move past a given point in 3 seconds? (1) 5 A (3) 18 A (2) 12 A (4) 45 A 1. What is the current in a circuit if 15 coulombs of electric charge move past a given point in 3 seconds? 5 A 18 A 12 A 45 A 2. If 60. electrons pass a given point in a conductor in one second, the current

More information

STATEWIDE CAREER/TECHNICAL EDUCATION COURSE ARTICULATION REVIEW MINUTES

STATEWIDE CAREER/TECHNICAL EDUCATION COURSE ARTICULATION REVIEW MINUTES STATEWIDE CAREER/TECHNICAL EDUCATION COURSE ARTICULATION REVIEW MINUTES Articulation Agreement Identifier: ELM 201 (2011-1) Identifier is the postsecondary course prefix followed by Plan-of-Instruction

More information

1. Purpose Experimental verification of an exponential dependency between two physical quantities. Perform numerical evaluations.

1. Purpose Experimental verification of an exponential dependency between two physical quantities. Perform numerical evaluations. Experimental Science P9: Capacitor charge and discharge 1. Purpose Experimental verification of an exponential dependency between two physical quantities. Perform numerical evaluations. 2. Introduction

More information

Chapter 21 Electric Current and Direct-Current Circuit

Chapter 21 Electric Current and Direct-Current Circuit Chapter 2 Electric Current and Direct-Current Circuit Outline 2- Electric Current 2-2 Resistance and Ohm s Law 2-3 Energy and Power in Electric Circuit 2-4 Resistance in Series and Parallel 2-5 Kirchhoff

More information

CURRENT ELECTRICITY. Electric Currents

CURRENT ELECTRICITY. Electric Currents 1 CURRENT ELECTRICITY Electric Currents Charges that produce repulsion and attraction between objects can also produce an electric current if the charge can flow though it. An electric current is actually

More information

E X P E R I M E N T 7

E X P E R I M E N T 7 E X P E R I M E N T 7 The RC Circuit Produced by the Physics Staff at Collin College Copyright Collin College Physics Department. All Rights Reserved. University Physics II, Exp 7: The RC Circuit Page

More information

Series and Parallel Resistive Circuits Physics Lab VIII

Series and Parallel Resistive Circuits Physics Lab VIII Series and Parallel Resistive Circuits Physics Lab VIII Objective In the set of experiments, the theoretical expressions used to calculate the total resistance in a combination of resistors will be tested

More information

Direct-Current Circuits

Direct-Current Circuits Chapter 26 Direct-Current Circuits Study resistors in series and parallel Consider Kirchoff s Rules The design and use of electronic measuring instruments R-C circuits The applications of circuits in household

More information

Two kinds of electrical charges

Two kinds of electrical charges ELECTRICITY NOTES Two kinds of electrical charges Positive charge Negative charge Electrons are negatively charged Protons are positively charged The forces from positive charges are canceled by forces

More information

Storing And Releasing Charge In A Circuit

Storing And Releasing Charge In A Circuit Storing And Releasing Charge In A Circuit Topic The characteristics of capacitors Introduction A capacitor is a device that can retain and release an electric charge, and is used in many circuits. There

More information

Electrical Measurements

Electrical Measurements Electrical Measurements Experimental Objective The objective of this experiment is to become familiar with some of the electrical instruments. You will gain experience by wiring a simple electrical circuit

More information

CHAPTER 28 ELECTRIC CIRCUITS

CHAPTER 28 ELECTRIC CIRCUITS CHAPTER 8 ELECTRIC CIRCUITS 1. Sketch a circuit diagram for a circuit that includes a resistor R 1 connected to the positive terminal of a battery, a pair of parallel resistors R and R connected to the

More information

Current Electricity Lab Series/Parallel Circuits. Safety and Equipment Precautions!

Current Electricity Lab Series/Parallel Circuits. Safety and Equipment Precautions! Current Electricity Lab Series/Parallel Circuits Name Safety and Equipment Precautions! Plug in your power supply and use ONLY the D.C. terminals of the power source, NOT the A. C. terminals. DO NOT touch

More information

6/06 E Field Energy Storage

6/06 E Field Energy Storage Capacitor charging-discharging setup About this lab: The volume energy density (joules/cubic meter, in mks units) stored in an electric field is proportional to E 2. (A similar relation involving B 2 holds

More information

Current Electricity continual movement of sustained charges. Potential (Voltage), Current, Resistance

Current Electricity continual movement of sustained charges. Potential (Voltage), Current, Resistance Current Electricity continual movement of sustained charges Potential (Voltage), Current, Resistance 1 Electric Current the flow of charge Two types of Current Where does the charge that moves come from?

More information

Electric current (symbol I) L 25 Electricity and Magnetism [3] Examples. Electrical resistance (symbol R) Potential difference or Voltage (symbol V)

Electric current (symbol I) L 25 Electricity and Magnetism [3] Examples. Electrical resistance (symbol R) Potential difference or Voltage (symbol V) L 25 Electricity and Magnetism [3] Electric current (symbol ) Electric circuits what conducts electricity what does and doesn t conduct electricity Current, voltage and resistance Ohm s Law Power loss

More information

What will we learn in this chapter?

What will we learn in this chapter? Chapter 19: Current, resistance, circuits What will we learn in this chapter? What are currents? Resistance and Ohm s law (no, there are no 3 laws). Circuits and electric power. Resistors in series and

More information

Ohm's Law and Power. B (2) If you have a hand-held transceiver which puts out 500 milliwatts, how many watts would this be?

Ohm's Law and Power. B (2) If you have a hand-held transceiver which puts out 500 milliwatts, how many watts would this be? Ohm's Law and Power B-005-1-5 (2) If you have a hand-held transceiver which puts out 500 milliwatts, how many watts would this be? 1. 5 2. 0.5 3. 50 4. 0.02 > A thousand milliwatts is one Watt. Converting

More information

13.10: How Series and Parallel Circuits Differ pg. 571

13.10: How Series and Parallel Circuits Differ pg. 571 13.10: How Series and Parallel Circuits Differ pg. 571 Key Concepts: 5. Connecting loads in series and parallel affects the current, potential difference, and total resistance. - Using your knowledge of

More information

Student Content Brief Advanced Level

Student Content Brief Advanced Level Student Content Brief Advanced Level Electric Circuits Background Information There are a variety of forces acting on the body of the Sea Perch. One important force is pushing electrons through the wires

More information

Preamble. Resistor Construction. In this section of my lectures we will be

Preamble. Resistor Construction. In this section of my lectures we will be Preamble Ohm s Law Physics, 8 th Edition Custom Edition Cutnell & Johnson Chapter 20.2 2 Pages 601-602 In this section of my lectures we will be developing the relationship between voltage, current and

More information

Chapter 2 Objectives

Chapter 2 Objectives Chapter 2 Engr228 Circuit Analysis Dr Curtis Nelson Chapter 2 Objectives Understand symbols and behavior of the following circuit elements: Independent voltage and current sources; Dependent voltage and

More information

ASSIGNMENT (PHYSICS) CLASS X PRACTICAL PRACTICE ASSIGNMENT

ASSIGNMENT (PHYSICS) CLASS X PRACTICAL PRACTICE ASSIGNMENT ASSIGNMENT (PHYSICS) CLASS X PRACTICAL PRACTICE ASSIGNMENT 1. For the circuit arrangement, shown above the student would observe (a) some reading in both the ammeter and the voltmeter (b) no reading in

More information

Physics A Unit 12 Circuits

Physics A Unit 12 Circuits Physics A Unit 12 Circuits From unit 11 through unit 13 you will study another of the major branches of physics, electromagnetism. In the second unit on electromagnetism we study simple circuits. I. Ohm

More information

OHM S LAW 05 AUGUST 2014

OHM S LAW 05 AUGUST 2014 OHM S LAW 05 AUGUST 2014 In this lesson, we: Current Lesson Description Revise the definitions of current, potential difference and emf Explore Ohm s law Identify the characteristics of ohmic and non-ohmic

More information

Chapter 1: DC circuit basics

Chapter 1: DC circuit basics Chapter : DC circuit basics Overview Electrical circuit design depends first and foremost on understanding the basic quantities used for describing electricity: Voltage, current, and power. In the simplest

More information

Kirchhoff's Rules and Applying Them

Kirchhoff's Rules and Applying Them [ Assignment View ] [ Eðlisfræði 2, vor 2007 26. DC Circuits Assignment is due at 2:00am on Wednesday, February 21, 2007 Credit for problems submitted late will decrease to 0% after the deadline has passed.

More information

= 1 R 1 + (2) + 1 R R 2

= 1 R 1 + (2) + 1 R R 2 PHYS 140 General Physics II EXPERIMENT 4 SERIES AND PARALLEL RESISTANCE CIRCUITS I. OBJECTIVE: The objective of this experiment is the study of series and parallel resistive circuits. The student will

More information

Preview of Period 12: Electric Circuits

Preview of Period 12: Electric Circuits Preview of Period 2: Electric Circuits 2. Voltage, Current, and esistance How are voltage, current, and resistance related? 2.2 esistance and Voltage of esistors in Connected in Series How does current

More information

CHAPTER12. Electricity. Multiple Choice Questions. Fig. 12.1

CHAPTER12. Electricity. Multiple Choice Questions. Fig. 12.1 CHAPTER12 Electricity Multiple Choice Questions 1. A cell, a resistor, a key and ammeter are arranged as shown in the circuit diagrams of Figure12.1. The current recorded in the ammeter will be Fig. 12.1

More information

Electric Charge, Energy, and Potential Difference

Electric Charge, Energy, and Potential Difference Electric Charge, Energy, and Potential Difference Outer or valence electrons determine chemical and electrical properties of solids. Add charge to an insulator and it stays where it is put. - - - - Add

More information

1. 1. Right Hand Rule Practice. Using the the right hand rule, find find the the direction of of the the missing information in in the the diagram.

1. 1. Right Hand Rule Practice. Using the the right hand rule, find find the the direction of of the the missing information in in the the diagram. 1. 1. Right Hand Rule Practice Using the the right hand rule, find find the the direction of of the the missing information in in the the diagram. (A) (A) up up (C) (C) left left (B) (B) down (D) (D) right

More information

PHYS225 Lecture 3. Electronic Circuits

PHYS225 Lecture 3. Electronic Circuits PHYS225 Lecture 3 Electronic Circuits Course Web Page http://people.physics.tamu.edu/depoy/phys225.html Up now Contains All lecture notes (PDF) All assignments Useful links Last lecture Devices not like

More information

Pre-Lab 7 Assignment: Capacitors and RC Circuits

Pre-Lab 7 Assignment: Capacitors and RC Circuits Name: Lab Partners: Date: Pre-Lab 7 Assignment: Capacitors and RC Circuits (Due at the beginning of lab) Directions: Read over the Lab Handout and then answer the following questions about the procedures.

More information