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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
qEy2
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B
qE2y
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C
qEy
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D
q2Ey
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Solution

The correct option is C $$qEy$$
K.E acquired $$=$$ work done
$$=$$ force$$\times$$ distance $$=qE\times y=qEy$$

Physics
NCERT
Standard XII

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