#11 Electric Potential and Conductors Why is the surface of a conductor an equip

Question

#11 Electric Potential and Conductors Why is the surface of a conductor an equipo- tential surface in general? A. Charges always form a uniform distribution on the surface of a conductor O B. Otherwise a potential difference would cause current to flow, not seen in steady state. C. Free charge always migrates away from the outer surface of a conductor 0 D. Coins are made of metal, and have been used safely for years. #12 Electric Potential and Conductors At the surface of a conductor any electric field lines present are: A. Perpendicular to the surface of the conductor O B. Parallel to the surface of a conductor. C. Always directed outward O D. Always directed inward. #13 Electric Potential and Conductors Two solid conducting spheres are connected with a long thin 10.0 meter wire. One sphere has a radius of 10.0 centimeters, and the larger sphere has a radius of 20.0 centimeters. The sphere with a 10.0 centimeter radius is held at an electric potential of 5.00 Volts. What is the electric potential of the larger sphere? 0 A. 2.50 Volts 0 B. 5.00 Volts O C. 10.0 Volts O D. 20.0 Volts #14 Fundamental Aspects of Capacitance The two plates of a capacitor hold +2500 pcC and-2500 C of charge, respectively, when the potential difference is 850 V. What is the capacitance? A. 4.56 F 0 B. 2.42 mF ° C. 2.94 F O D. 1.78 nF

Explanation / Answer

11) charges are always form a uniform distribution on the surface of the conductor

option A

12) perpendicular to the surface of the surface of the conductor

option A

13) both are having same potential that is 5 volts

14) q = cv

c = q/v = 2500*10^-6/850 = 2.94*10^-6 F

option c

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