2. Electric Potential and Capacitance
easy

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

$qE{y^2}$

B

$q{E^2}y$

C

$qEy$

D

${q^2}Ey$

(AIPMT-1998)

Solution

(c) Kinetic energy = Force $×$ Displacement = $qEy$

Standard 12
Physics

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