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Question

A charge q is located above the centre of a square plate of side a, at a distance a2. The electric flux through the plate is.


Your Answer
A
q/4ϵ
Correct Answer
B
q/6ϵ
Your Answer
C
q/2ϵ
Your Answer
D
q/8ϵ

Solution

The correct option is B q/6ϵ
Contruct a cube of side length a with one of the faces as the plate. The flux through the cude is qϵ. The cube has 6 faces, so the flux per each face is q6ϵ.

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