Question

8 electric dipoles having charges e are placed at the center of a cube. The net flux coming out of the cube surface is _________

(a) Zero

(b) \(\frac {e}{\varepsilon_o}\)

(c) \(\frac {8e}{\varepsilon_o}\)

(d) \(\frac {16e}{\varepsilon_o}\)

I have been asked this question in an interview.

I want to ask this question from Gauss’s Law topic in chapter Charges and Fields of Physics – Class 12

Answer 1

The correct option is (a) Zero

To explain I would say: Electric dipole is the combination of a couple of positive and negative charges having the same magnitude. Therefore, the total charge of an electric dipole is 0. That means the total charge inside the cube is zero and according to Gauss’s Law, the net electric flux coming out of the cube is zero.