Q. An electron initially at rest is accelerated through a potential difference of 1V. The energy acquired by electron is
A) $10^{- 19}$ J
B) $1.6 \times 10^{- 19}$ erg
C) $1.6 \times 10^{- 19}$ J
D) 1 J
Explanation
(c) Work required to move one electron ($e$) through a potential difference of 1 V, gives the unit of energy abbreviate as $eV$.
That is , Energy=$\ eV$
Given, $e = 1.6 \times 10^{- 19}$ C, $V = 1$ volt
$\therefore\ \ \ \ \ \ \ Energy = 1.6 \times 10^{- 19} \times 1 = 1.6 \times 10^{- 19}$ J
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.