Electrostatics

Question: If identical charges $( - q)$ are placed at each corner of a cube of side b, then electric potential energy of charge $( + q)$ which is placed at centre of the cube will be

1) $\frac{{8\sqrt 2 {q^2}}}{{4\pi {\varepsilon _0}b}}$

2) $\frac{{ - 8\sqrt 2 {q^2}}}{{\pi {\varepsilon _0}b}}$

3) $\frac{{ - 4\sqrt 2 {q^2}}}{{\pi {\varepsilon _0}b}}$

4) $\frac{{ - 4{q^2}}}{{\sqrt 3 \pi {\varepsilon _0}b}}$

Solution:

Explanation: Explanation

electric-field-potential

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