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A proton of mass m and charge q enters a...

A proton of mass `m` and charge `q` enters a magnetic field `B` with a velocity `v` at an angle `theta` with the direction of `B`.The radius of curvature of the resulting path is

A

`(mvsintheta)/(qB)`

B

`(mv)/(qBsintheta)`

C

`(mv)/(qB)`

D

`(mvtantheta)/(qB)`

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The correct Answer is:
A
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