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Dorney

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**[SOLVED] Electric Field and Electric Potential**

1. Refer to a sphere of radius R that has a positive charge Q uniformly distributed on its surface.

Which of the fllowing represents the magnitude of the electric field E and the potential V as functions of r, the distance from the center of the sphere, where

**r < R**?

A) E = 0 and V = kQ/R

B) E = 0 and V = kQ/r

C) E = 0 and V = 0

D) E = kQ/(r^2) and V = 0

E) E = kQ/(R^2) and V = 0

Which of the following represents the magnitude of the electirc field E and the potential V as functions of r, the distance from the center of the sphere, where

**r > R**?

A) E = kQ/(R^2) and V = kQ/R

B) E = kQ/R and V = kQ/R

C) E = kQ/R and V = kQ/r

D) E = kQ/(r^2) and V = kQ/r

E) E = kQ/(r^2) and V = kQ/(r^2)

2. E = kq/(r^2) and V = kq/r

3. Thinking it through, I got the answers B and D, respectively.

Thanks in advance!