The potential of a uniformly charged sphere is lowest at a) infinity. b) a dista

Question

The potential of a uniformly charged sphere is lowest at a) infinity. b) a distance from the sphere equal to its radius. c) a distance from the sphere equal to its diameter. d) the surface of the sphere. e) the center of the sphere. 9. If the voltage applied to a parallel-plate capacitor is doubled, the electric field between plates would. a) is halved. battery would b) quadruples. c) is tripled. d) remains the same. e) is doubled. 10 Three identical capacitors are connected in series If a total charge of Q flows from the battery, how much charge does each capacitor carry? a) 9Q b) 3Q c) Q d) Q/3 e) Q/9 11. Which of the following cylindrical wires has the largest resistance? All wires are made of the same material a) a wire of length L and diameter 2d b) a wire of length L and diameter d/2 c) a wire of length L/2 and diameter d d) a wire of length L and diameter d e) a wire of length L/2 and diameter 2d 12. Three identical resistors are connected in series to a battery. If the current of 12 A flows from the battery, how much current flows through any one of the resistors? a) 12 A b) 4 A c) 36A d) 24 A e)zero 13. If you connected two identical storage batteries together in parallel, and place them in a circuit, the combination will provide a) twice the voltage and twice the total charge that one battery would. b) twice the voltage and the same total charge that one battery would. c) the same voltage and twice the total charge that one battery would. d) half the voltage and half the total charge that one battery would e) half the voltage and the same total charge that one battery would. 14. A current reading is obtained by properly placing an ammeter in a circuit consisting of one resister and one battery. As a result, a) the voltage drop across the resister increases. b) the current flowing in the circuit increases. c) the current flowing in the circuit decreases. d) the current flowing in the circuit does not change.

Explanation / Answer

8. Infinity

9. Is doubled because E = v/d

10. The charge us distributed equally in all the capacitors. Therefore ans is d

12. As we known in series resistor the charge is distributed equally therefore ans is b

13. C

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