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A charged particle is moving in a unifor...

A charged particle is moving in a uniform magnetic field in a circular path. Radius of circular path is `R`. When energy of particle is doubled, then new radius will be

A

`R sqrt2`

B

`R sqrt3`

C

2 R

D

3 R

Text Solution

Verified by Experts

The correct Answer is:
A
Since , `r prop sqrtk`
`implies (r_(1))/(r_(2)) = ((k)/(2k))^(1/2) implies r_(2) = sqrt2 r_(1) implies r_(2) = sqrt2 R`
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