MHT CET 2022 Physics question
A charge Q C is placed at the center of a cube. If is the permittivity of vacuum then the flux through one face and two opposite faces of the cube is respectively
Answer: (A)
Solution
By Gauss's law, the total flux through the cube is (with expressed in the same units as used for the symbol). By symmetry (charge at the centre) it is shared equally among the 6 faces, so the flux through one face is .
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