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Q.

A point charge 8.85 μC is placed at the centre of a cube. Then electric flux through one of the focus of the cube is

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a

34×106 V−m

b

18×106 V−m

c

1066 V−m

d

12×106 V−m

answer is C.

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Detailed Solution

Flux ϕ through the entire surface of the cube =Q∈0∴ Flux through one face ϕE=ϕ6=Q6∈0∴ ϕE=8.85×10−66×8.85×10−12V−m=16×106 V−m
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A point charge 8.85 μC is placed at the centre of a cube. Then electric flux through one of the focus of the cube is