Question

A particle of mass $m$ and charge $q$ is placed at rest in a uniform electric field $E$ and then released. The kinetic energy attained by the particle after moving a distance $y$ is

• A. $qEy^{2}$
• B. $qE^{2}y$
• C. $qEy$
• D. $q^{2}Ey$

Answer 1

Answer: (C)

$qEy$

Answer 2

Kinetic energy = Force × Displacement

= qEy