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:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → $qEy$
Mass of changed particle = m
Charge on particle = +q
Now,
force (F) on charge particle = qE
and,
Work done by charge particle on moving y distance = kinetic energy
$= qEy$ [$W_0$ force displacement]