ABCD is a square of side Length l and O is its centre. The line OP is perpendicular to the plane of the square and OP= l/2. A point charge Q is placed at point P. Then electric flux through the square ABCD is
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a
Qε0
b
Q4ε0
c
Q8ε0
d
Q6ε0
answer is D.
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Detailed Solution
(4)Construct a cube of length ‘l’ Point P is the centre of cube. Charge Q is placed at P.∴ Flux through 6 faces of the cube = Qε0∴ Flux through each face = a6ε0