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WB JEE 2021
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WB JEE 2021 Physics - Electromagnetic Induction Question 7 English
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 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 statement.
A
The particle enters region-c only if $$v > {{qLB} \over m}$$.
B
The particle enters region-c only if $$v < {{qLB} \over m}$$.
C
Path of the particle is a circle in region-b.
D
Time spent in region-b is independent of velocity v.
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