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Q.

A particle has a mass 400 times than that of the electron and charge is double than that of a electron. It is accelerated by 5V of potential difference. Initially the particle was at rest, then its final kinetic energy will be

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a

5 eV

b

10 eV

c

100 eV

d

2000 eV

answer is B.

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Detailed Solution

ΔE=2e×5V=10eV⇒ Final kinetic energy =10eV
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