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Question: The mass of a particle is 400 times than that of an electron and the charge is double. The particle ...

The mass of a particle is 400 times than that of an electron and the charge is double. The particle is accelerated by 5 V. Initially the particle remained in rest, then its final kinetic energy will be.

A

5 eV

B

10 eV

C

100 eV

D

2000 eV

Answer

10 eV

Explanation

Solution

E=eV=2e×5=10eVE = e V = 2 e \times 5 = 10 \mathrm { eV }