Question

. A point change of +20 micro coulomb is placed at one corner of a cube of side 10cm. what is the
flux passing through the cube.
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Answer 1

Answer:

Due to symmetry, the amount of flux coming out of one cube face will be the same as the flux coming out of 1/6 surface of the sphere, and hence equal to q/6 coulombs. Therefore, electric flux (in coulombs) coming out of one cube face will be equal to 1/6 of the charge (in coulombs) placed at the centre of the cube.