Question

a point charge 10 mc is at a distance of 5cm directly above centre of a square of side 10cm what is the magnitude of electric flux through square ?
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Answer 1

Answer:

The square can be considered as one face of a cube of edge 10 cm with a centre where charge q is placed. According to Gauss's theorem for a cube, total electric flux is through all its six faces. Therefore, electric flux through the square is 1.88 × 105 N m2 C−1.