Electrostatics Question 398

Question: The ratio of momenta of an electron and an a-particle which are accelerated from rest by a potential difference of 100 volt is [UPSEAT 1999]

Options:

A) 1

B) 2memα

C) memα

D) me2mα

Show Answer

Answer:

Correct Answer: D

Solution:

Momentum p=2mK; where K = kinetic energy = Q.V therefore p=2mQV

therefore pmQpepα=meQemαQα

=me2mα



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