Two identical infinite positively charged sheets and a positively charged spherical body are arranged as shown in the original figure. Which relation between the electric fields at points A, B, C and D is correct?

Question

G1 Physics · Accepted Answer

Between two identical positively charged infinite sheets, the fields produced by the sheets are equal and opposite, so their contributions cancel. Therefore the net field at interior points A and B is due to the charged spherical body. From the geometry shown in the source figure, A is closer to the sphere than B, so EA > EB. Outside the pair of sheets, the fields of the sheets add. Their sheet contribution has the same magnitude on the two outer sides, but the charged sphere contributes dif…