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A proton describes a circular path of ra...

A proton describes a circular path of radius 5 cm in a transerve magnetic field. If the speed of the proton is doubled, then the radius of the circular path will be

A

`5 cm`

B

`7.5 cm`

C

`10 cm`

D

`2.5 cm`

Text Solution

Verified by Experts

The correct Answer is:
C
`r=(mv)/(qB),r_2/r_1=(m(2v))/(qB)xx (qB)/(mv)=2 therefore r_2=10 cm`
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