Question

Pick out the expression of electric potential energy from the following.

(a) U = \(\frac {1}{(4\pi \varepsilon_o)} \times [ \frac {q_1q_2}{r} ]\)

(b) U = 1 × (4πεo) × [ \(\frac {q_1q_2}{r}\) ]

(c) U = \(\frac {1}{(4\pi \varepsilon_o)} \times [ \frac {q_1}{q_2}{r} ]\)

(d) U = \(\frac {1}{(4\pi \varepsilon_o)}\) × [q1q2]

I had been asked this question in semester exam.

I need to ask this question from Potential Energy in an External Field in portion Electrostatic Potential and Capacitance of Physics – Class 12

Answer 1

Right option is (a) U = \(\frac {1}{(4\pi \varepsilon_o)} \times [ \frac {q_1q_2}{r} ]\)

Explanation: electric potential energy of a system of charges is the total amount of work done in bringing the various charges to their respective positions from infinitely large mutual separations.

The expression for electric potential energy is given by:

U = \(\frac {1}{(4\pi \varepsilon_o)} \times [ \frac {q_1q_2}{r} ]\)