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A charged particle enters a unifrom mag...

A charged particle enters a unifrom magnetic field with velocity vector at an angle of `45^(@)` with the magnetic field . The pitch of the helical path followed by the particles is `rho` . The radius of the helix will be

A

`(mvsintheta)/(qB)`

B

`(mv)/(qBsintheta)`

C

`(mv)/(qB)`

D

`(mvtan theta)/(qB)`

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The correct Answer is:
A
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