Electric Field Video Lessons

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Problem: In the figure, point A is a distance L away from a point charge Q. Point B is a distance 4L away from Q. What is the ratio of the electric field at  B to that at A, EB/EA? A) 1/16 B) 1/9 C) 1/4 D) 1/3 E) This cannot be determined since neither the value of Q nor the length L is specified.

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Problem Details

In the figure, point A is a distance L away from a point charge Q. Point B is a distance 4L away from Q. What is the ratio of the electric field at  B to that at A, EB/EA?

A) 1/16

B) 1/9

C) 1/4

D) 1/3

E) This cannot be determined since neither the value of Q nor the length L is specified.

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