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Potential Energy of a Point Charge Placed at a Point with Non Zero Potential

A particle ha...

Question

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

A

5 eV

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B

10 eV

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C

100 eV

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D

2000 eV

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Solution

The correct option is B 10 eV
$Δ E = 2 e \times 5 V = 10 e V \Rightarrow$ Final kinetic energy $= 10 e V$

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