Question

A charged particle of mass '$m$' and charge '$q$' is at rest. It is accelerated in a uniform electric field of intensity '$E$' for time '$t$'. The kinetic energy of the particles after time $t$ is

• A. $\frac{Eqm}{2t}$
• B. $\frac{E^2 q^2 t^2}{2m}$
• C. $\frac{2\text{E}^2\text{t}^2}{\text{mq}^2}$
• D. $\frac{\text{Eqt}}{\text{m}}$

Hint:

Work done by electric field $F \cdot d$ is another way to find $KE$, where $d = \frac{1}{2}at^2$.

Answer 1

The Correct Option is B