PSI AP Physics 2 Electric Potential and Capacitors Multiple Choice Questions. Multiple Choice Questions
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1 PSI AP Phyic 2 Electric Potentil nd Cpcitor Multiple Choice Quetion Multiple Choice Quetion. A metl wire connect two chrged conducting phere. Sphere h greter rdiu thn phere 2. Which of the following ttement ccurtely decribe the electric potentil of phere when compred to phere 2? A. It i mller B. It i greter C. It i equl D. Vrie; depend on the chrge tht the phere initilly hd 2. Wht i the SI unit for electric potentil? A. Joule B. Coulomb C. Frd D. Volt 3. Four poitive chrge of equl mgnitude re orgnized into qure with ide length. Wht i the Electric Potentil t the center of the qure? B. 4kq C. 8 2kq D. 4 2kq 4. The two chrge in the top corner of the qure re replced with negtive chrge of the me mgnitude. Wht i the new Electric Potentil t the center of the qure? B. 4kq C. 8 2kq D. 4 2kq
2 5. Which of the following ttement() i/re true for the bove prllel plte cpcitor? i. Both plte hve the me electric potentil ii. There i uniform electric field iii. It would tke the me externl work to move poitive prticle from A to B it would to move it from B to A. A. i B. ii C. ii nd iii D. i nd iii E. i, ii nd iii 6. Ue thi digrm for quetion 6-8. Wht i the electric potentil t point c if ech ide of the tringle h length? B. 4 2kq C. 2kq D. 2 2kq 7. Wht i the electric potentil energy of the ytem of two chrge t point A nd B? B. 4 2kq2 C. kq2 D. 2 2kq2
3 8. Wht i the electric potentil t point C if the chrge t point B i replced with new chrge -Q? B. 4 2kq C. 2kq D. 2 2kq 9. Given plot of equipotentil line, how would you drw the electric field line? A. Perpendiculr; towrd lower potentil B. Prllel to ll equipotentil line C. Perpendiculr; towrd higher potentil D. Perpendiculr; towrd higher line of higher energy 0. A prllel plte cpcitor i connected to bttery. Which of the following digrm mot ccurtely portry the electric field of cpcitor? A. B. C. D.
4 . Two chrge re eprted by ditnce d. If the ditnce between them i doubled, how doe the electric potentil energy chnge? A. Potentil energy i doubled B. Potentil energy i hlved C. Potentil energy i qudrupled D. Potentil energy i qurtered 2. A olid conducting metl phere h chrge +Q. Where on the phere i thi chrge locted? A. +Q t the center of the phere B. -Q t the center of the phere nd +2Q t the urfce of the phere C. +Q evenly ditributed throughout the entire phere D. +Q pred evenly on the urfce of the phere 3. How much externl work i needed to move chrge +q from point A to point B long the deignted pth if the electric potentil t point A i 00V nd the electric potentil t point B i 200V? B. 00q C. -00q D. 300q
5 Ue thi digrm for quetion Two chrge re plotted on the grph bove. Ech h chrge of +9 nc nd ech dh repreent m. Wht i the electric potentil t the origin? A. 4 V B. 0 V C. 43 V D V 5. How much work would it tke to move 4 nc tet chrge from infinity to the origin? J B. 458 nj C. 30 nj D nj Ue thi digrm for Quetion Wht i the direction of the electric field t point A? A. Up B. Down C. Right D. Left 7. How much externl work would it tke to move +8 μc chrge from point A to point B t contnt velocity? A. 320 μj B μj C. 60 μj D. -60 μj
6 8. How much externl work would it tke to move -8 μc chrge from point B to point A t contnt velocity? A. 320 μj B μj C. 60 μj D. -60 μj 9. How much externl work would it tke to move +8 μc chrge from point A to point B nd bck to point A? J B μj C. 60 μj D. -60 μj 20. A prllel plte cpcitor with cpcitnce C i chrged to vlue Q nd then iolted. The eprtion between the plte i then doubled. The work necery to eprte thee plte w: A. Q2 C 4 B. Q2 C 2 C. Q 2 C D. 3Q2 C 2 2. A poitive chrge Q i ditnce S from point P. The electric potentil t P could be doubled by which of the following? i. Plcing n identicl chrge Q t nother point ditnce S from P ii. Plcing chrge 2Q t ditnce 2S from P iii. Plcing chrge 4Q t ditnce 2S from P A. I only B. II only C. II nd III only D. I nd II only 22. Which of the following vrible cn be ffected if dielectric, uch heet of inulting pltic mteril, i inerted into prllel plte cpcitor (chrged nd diconnected from the bttery) when compred to cpcitor without the mteril? i. Cpcitnce ii. Electric Field between the plte iii. Electric Potentil A. I nd III only B. II only C. I nd II only D. I. II, nd III
7 23. A prllel plte cpcitor h n re of 000 cm 2 nd ditnce of cm. A new dielectric mteril i inerted nd it new cpcitnce vlue i clculted to be.77 x 0-0 F. Wht mut be the vlue of the dielectric contnt κ?.75 B..5 C. 2 D A prllel plte cpcitor i chrged to mximum vlue of +Q nd diconnected from the bttery. The voltge between the plte i V, nd the energy tored in the cpcitor i U. If chrge i hlved nd the cpcitnce i not chnged, how re electric potentil nd potentil energy ffected? A. Both potentil nd potentil energy hlved B. Potentil i hlved nd potentil energy i qurtered C. Both potentil nd potentil energy remin unchnged D. Both potentil nd potentil energy re both doubled 25. Why doe the totl electric field between the plte of n iolted cpcitor decree when dielectric i inerted? A. The dielectric mteril become polrized nd crete upporting electric field. B. The dielectric mteril become polrized nd crete n oppoing electric field. C. The cpcitnce decree. D. The voltge cro the cpcitor incree. 26. The cpcitnce of prllel-plte cpcitor depend on which of the following? I. The plte re II. The plte eprtion III. The voltge of the cpcitor A. II only B. III only C. I nd II only D. II nd III only 27. A prllel plte cpcitor h chrge of Q. The voltge between the plte i V, nd the energy tored in the cpcitor i U. If C i hlved nd Q i not chnged, how re V nd U ffected? A. Both V nd U re hlved B. V i hlved nd U i doubled C. Neither V nor U chnge D. Both V nd U re doubled
8 28. The chrge for prllel plte cpcitor i determined to be 450 x 0-6 C. It i chrged with ource of V = 0V. Wht i the energy tored on the cpcitor? J B J C J D J 29. A prllel-plte cpcitor h cpcitnce C. Wht i the new cpcitnce when dielectric with κ = 4 i inerted between it plte? A. B. C 6 C 4 C. C D. 4 C 30. A prllel plte cpcitor C h plte eprtion of ditnce d nd n re A. Wht i the new cpcitnce if the re of the plte i kept contnt nd the plte eprtion i hlved? A. B. C 4 C 2 C. 2 C D. 4 C 3. A prllel plte cpcitor C h re A nd plte eprtion d. Wht i the new cpcitnce if the re i hlved nd the plte eprtion i doubled? A. B. C 4 C 2 C. C D. 2 C 32. A prllel plte cpcitor C h plte eprtion of ditnce d nd n re A. Wht i the new cpcitnce if the re of the plte i doubled nd the plte eprtion i hlved? A. 4 C B. 2 C C. C D. 2 C 33. For et of oppoitely chrged, infinite prllel plte, wht i true bout the electric field inide nd outide the plte? A. The electric field decree you move from the poitive to the negtive plte nd i non zero contnt outide. B. The electric field decree you move from the poitive to the negtive plte nd i non zero contnt outide. C. The electric field i non zero contnt within the plte nd zero outide. D. The electric field i zero within the plte nd non zero contnt outide.
9 34. The direction of the electric field in pce i: A. depend on the mgnitude of the electric potentil. B. in the direction of contnt electric potentil. C. in the direction of decreing electric potentil. D. in the direction of increing electric potentil. 35. Which of the following will incree the cpcitnce of cpcitor? Select two nwer. A. Cloer plte pcing B. Increing chrge C. Decreed plte re D. Adding dielectric mteril with greter dielectric contnt 36. Which eqution clculte for energy tored on cpcitor? Select two nwer. A. 2 Q 2 C B. C. 2 QV 2 CV D. 2 Q 2 V 37. A Dielectric cn do which of the following in cpcitor? Select two nwer. A. Decree cpcitnce B. The electric field between plte i reduced. C. Incree cpcitnce D. The electric field between plte i increed. 38. Identify the vrible which determine the mximum cpcitnce cpcitor cn tore? Select two nwer. A. Are dimenion/hpe of the cpcitor B. Seprtion ditnce of prllel plte C. Power ource connected to the cpcitor D. How long cpcitor i connected to power ource
10 Anwer. C 2. D 3. D 4. A 5. B 6. C 7. C 8. A 9. A 0. A. B 2. D 3. B 4. A 5. B 6. D 7. D 8. C 9. A 20. B 2. D 22. D 23. C 24. B 25. B 26. C 27. D 28. A 29. D 30. C 3. C 32. A 33. C 34. C 35. A, D 36. A, B 37. B, C 38. A, B
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