Electrostatic Potential and Capacitance - Result Question 21
23. 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) $q E y^{2}$
(b) $q E^{2} y$
(c) $q E y$
(d) $q^{2} E y$
[1998]
Topic 3: Capacitors, Capacitance, Grouping of Capacitors & Energy Stored in a Capacitor.
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Answer:
Correct Answer: 23. (c)
Solution:
- (c) K.E. $=$ Force $\times$ distance $=q E . y$
