Page 1. Name: 1) A periodic wave travels through a rope, as shown in the diagram below.

Transcription

1 Name: 1) A periodic wave travels through a rope, as shown in the diagram below Page 1 As the wave travels, what is transferred between points A and B? A) mass, only B) energy, only C) neither mass nor energy D) both mass and energy 2) A negatively charged rod is held near the knob of an uncharged electroscope. Which diagram best represents the distribution of charge on the electroscope? A) B) C) D) 3) Which is an example of a longitudinal wave? A) sound wave B) water wave C) gamma ray D) x-ray 4) In which type of wave is the disturbance parallel to the direction of wave travel? A) torsional B) longitudinal C) circular D) transverse 5) The diagram below represents a segment of a periodic wave traveling to the right in a steel spring. What type of wave is illustrated by the diagram? A) torsional B) transverse C) elliptical D) longitudinal 6) The number of water waves passing a given point each second is the wave's A) velocity B) frequency C) wavelength D) amplitude 7) What is the frequency of a wave if its period is 0.25 second? A) 12 Hz B) 4.0 Hz C) 0.25 Hz D) 1.0 Hz 8) The graph below represents the displacement of a point in a medium as a function of time when a wave passes through the medium. What is the frequency of the wave? A) 4.0 Hz B) 0.25 Hz C) 0.50 Hz D) 2.0 Hz

2 Page 2 9) In a vacuum, the wavelength of green light is 5 x 10-7 meter. What is its frequency? A) 6 x 1015 Hz B) 2 x Hz C) 6 x 1014 Hz D) 2 x Hz 10) As the period of a wave decreases, the wave's frequency A) increases B) remains the same C) decreases 11) The frequency of a light wave is 5.0 x 1014 hertz. What is the period of the wave? A) 2.0 x s B) 5.0 x s C) 1.7 x 106 s D) 6.0 x l07 s 12) The diagram below represents a wave traveling in a uniform medium. Which characteristic of the wave is constant? A) frequency B) wavelength C) amplitude D) period 13) If the frequency of a sound wave in air at STP remains constant, its energy can be varied by changing its A) speed B) period C) amplitude D) wavelength 14) Which distance represents the wavelength of the wave shown below? A) A B) B C) C D) D 15) The speed of a transverse wave in a string is 12 meters per second. If the frequency of the source producing this wave is 3.0 hertz, what is its wavelength? A) 36 m B) 4.0 m C) 2.0 m D) 0.25 m 16) The diagram below shows a parked police car with a siren on top. The siren is producing a sound with a frequency of 680 hertz, which travels first through point A and then through point B, as shown. The speed of the sound is 340 meters per second. If the car were to accelerate toward point A, the frequency of the sound heard by an observer at point A would A) remain the same B) decrease C) increase 17) An opera singer's voice is able to break a thin crystal glass if the singer's voice and the glass have the same natural A) wavelength B) amplitude C) speed D) frequency 18) What is the current in a 1,200-watt heater operating on 120 volts? A) 10. amperes B) 20. amperes C) 0.10 ampere D) 5.0 amperes 19) If the voltage across a 12-ohm resistor is 4.0 volts, the current through the resistor is A) 0.33 A B) 4.0 A C) 48 A D) 3.0 A 20) If the diameter of a wire were to increase, its electrical resistance would A) decrease B) remain the same C) increase

3 Page 3 21) The electrical resistance of a metal wire could be decreased by A) increasing its length B) increasing its temperature C) increasing its diameter 22) In the electrical circuit diagram, the equivalent resistance of R1, R2, and R3 is approximately A) 7 ohms B) 20 ohms C) 2 ohms D) 10 ohms 23) Which quantity must be the same for each component in any series circuit? A) voltage B) resistance C) current D) power 24) What is the current in the circuit represented in the diagram below? A) 1 A B) 6 A C) 2 A D) 3 A 25) What is the current in ammeter A in the diagram below? A) 1 A B)! A C) 3 A D) 9 A 26) An electric heater rated at 4,800 watts is operated on 120 volts. What is the resistance of the heater? A) 576,000 O B) 3.0 O C) 40. O D) 120 O 27) A magnetic field will be produced by A) moving neutrons B) stationary ions C) moving electrons D) stationary protons 28) The field around a permanent magnet is caused by the motions of A) neutrons B) electrons C) protons D) nucleons

4 29) The diagram below shows a compass placed near the north pole, N, of a bar magnet Page 4 Which diagram best represents the position of the needle of the compass as it responds to the magnetic field of the bar magnet? A) B) C) D) 30) An electromagnet would have the greatest strength if its wire were wrapped around a core made of A) copper B) iron C) wood D) aluminum 31) Electromagnetic waves can be generated by accelerating A) a hydrogen atom B) a photon C) an electron D) a neutron 32) How many nodes are represented in the standing wave diagram below? A) 2 B) 3 C) 4 D) 6 33) The distance between successive antinodes in the standing wave pattern shown below is equal to A)! wavelength B) 2 wavelengths C) 1 wavelength D) \ wavelength 34) The diagram below represents a rope along which two pulses of equal amplitude, A, approach point P. When the two pulses meet at P, the vertical displacement of the rope at point P will be A) A B) 2A C) \A D) 0

5 35) Which property of light is illustrated by the diagram below? Page 5 A) refraction B) reflection C) dispersion D) diffraction 36) Which phenomenon of light is illustrated by the diagram below? A) diffuse reflection B) refraction C) regular reflection D) diffraction 37) Which phenomenon of light is illustrated by the diagram below? A) regular reflection B) dispersion C) diffuse reflection D) refraction 38) Which diagram best illustrates wave refraction? A) B) C) D) 39) As monochromatic light passes from air into glass, its speed A) remains the same B) increases C) decreases 40) As the color of light changes from red to yellow, the frequency of the light A) increases B) remains the same C) decreases 41) Which part of an atom is most likely to be transferred as a body acquires a static electric charge? A) electron B) positron C) proton D) neutron 42) Neutral atoms always have equal numbers of A) protons and positrons B) electrons and neutrons C) protons and electrons D) protons and neutrons

6 Page 6 43) As shown in the diagram below, a charged rod is held near, but does not touch a neutral electroscope. The charge on the knob becomes A) negative and the leaves become negative B) negative and the leaves become positive C) positive and the leaves become negative D) positive and the leaves become positive 44) A wool cloth becomes positively charged as it A) gains protons B) loses protons C) loses electrons D) gains electrons 45) The coulomb is a unit of electrical A) resistance B) potential C) charge D) current 46) The electrical force of attraction between two point charges is F. The charge on one of the objects is quadrupled and the charge on the other object is doubled. The new force between objects is A) 6F B) 8F C) \F D) 2F 47) The distance between two point charges is tripled. Compared to the original force, the new electrostatic force between the charges is A) decreased to one-ninth B) increased by a factor of nine 48) The diagram represents two charges, q1 and q2, separated by distance d. C) decreased to one-third D) increased by a factor of three Which change would produce the greatest increase in the electrical force between the two charges? A) doubling d, only C) doubling d and charges q1 and q2 B) doubling charge q1, only D) doubling d and charge q1, only 49) Which is a vector quantity? A) electric field intensity B) electrical energy C) electric charge D) electric power 50) The number of electrons that pass a certain point in a conductor in a given amount of time is defined as A) potential difference B) resistance C) electric current D) charge