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A particle of mass m and charge q moving...


A particle of mass m and charge q moving with velocity v enters region-b from region-a along the normal to the boundary as shown is in the figure. Region-b has a uniform magnetic field B perpendicular to the plane of the paper. Also, region-b has length L. Choose the correct statements :

A

A. The particle enters region-c only if `vgt(qLB)/m`

B

B. The particle enters region -c only if `vlt(qLB)/m`

C

C. Path of the particle is a circle in region-b

D

D. Time spent in region-b is independent of velocity v

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