If an electron is accelerated from rest through a potential of \( V...

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If an electron is accelerated from rest through a potential of \( V \) volts, then kinetic energy \( K \) gained by it
(a) \( K=e V \)
(b) \( K=\frac{1}{2} \mathrm{eV} \)
(c) \( K=\frac{2}{3} \mathrm{eV} \)
(d) \( K=0 \)
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