Assertion: `alpha` and `beta` particles are accelerated through same potential difference. Finally both particles have sma linear momentum.
Reason: Linear momentum `= sqrt(KE xx 2 xx mass)`

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer

D

Explanation

`p = sqrt(2mKE)`
`palpha = sqrt(2m_(alpha)KE)`
`pbeta = sqrt(2m_(beta) KE)`
`kE` is for `alpha` prticles is two times the `KE` of `beta` particles.
But `m_(alpha) gt gt gt m_(beta)`
`rArr p_(alpha) != p_(beta)`