An electron moves from an electrode at an electric potential of to another electrode at

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

Problem

An electron moves from an electrode at an electric potential of

-50\,\text{V}

to another electrode at

+20\,\text{V}

. What is the resulting change in the electron’s electric potential energy? (Electron charge

e = 1.6\times10^{-19}\,\text{C}

) (a)

-7.0\times10^{-18}\,\text{J}

(b)

+1.1\times10^{-17}\,\text{J}

(c)

-1.1\times10^{-17}\,\text{J}

(d)

-3.2\times10^{-18}\,\text{J}