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A charge Q is placed at the corner of a cube. The electric flux through all the six faces of the cube is
- Q / 3ε₀
- Q / 6ε₀
- Q / 8ε₀
- Q / ε₀
Correct answer: Q / 8ε₀
Solution
When a charge Q is placed at the corner of a cube, it is shared by 8 cubes. By Gauss's law, the total flux due to charge Q is Q/ε₀. Since the charge is shared equally, the flux through one cube is (Q/8ε₀).
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