Identify the correct expression for the electrostatic potential energy between two…

PHYSICS · Single correct · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance

Problem

Identify the correct expression for the electrostatic potential energy

U

between two nuclei of charges

Z_1e

and

Z_2e

separated by a distance

r

in vacuum. (a)

U = \dfrac{1}{4\pi\varepsilon_0}\dfrac{(Z_1+Z_2) e^2}{r}

(b)

U = -\,\dfrac{1}{4\pi\varepsilon_0}\dfrac{Z_1 Z_2 e^2}{r}

(c)

U = \dfrac{1}{4\pi\varepsilon_0}\dfrac{Z_1 Z_2 e^2}{r}

(d)

U = \dfrac{1}{4\pi\varepsilon_0}\dfrac{Z_1 Z_2 e^2}{2r}