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Q.

The ratio of momenta of an electron and an α-particle which are accelerated from rest by a potential difference of 100 volt is

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An Intiative by Sri Chaitanya

a

1

b

2memα

c

memα

d

me2mα

answer is D.

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Detailed Solution

Momentum p=2mK; where K= kinetic energy =Q.V⇒p=2mQV⇒p∝mQ⇒pepα=meQemαQα=me2mα
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