Electric Charges and Fields - Result Question 43

43. A charge Q is placed at the corner of a cube. The electric flux through all the six faces of the cube is

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(a) Q/3ε0

(b) Q/6ε0

(c) Q/8ε0

(d) Q/ε0

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Answer:

Correct Answer: 43. (c)

Solution:

(c) According to Gauss’s theorem, electric flux through a closed surface =Qε0 where q is charge enclosed by the surface.

The charge is kept at a corner of a cube so it can be visualised as being at the centre of 8 cubes.

The flux through each cube will be 18 of the flux θEo

Flux through all six faces =θ8EO



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