First slide

Potential energy

Question

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

Easy

A

5 eV
B

10 eV
C

100 eV
D

2000 eV

Solution

$ΔE = 2 e \times 5 V = 10 eV \Rightarrow Final kinetic energy = 10 eV$

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