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Easy

Physics-

A particle of mass m and charge q, moving with velocity V enters Region II normal to the boundary as shown in fig Region II has a uniform magnetic field B perpendicular to the plane of the paper The length of the Region II is $l$ Then

Physics-General

The particle enters Region III only if its velocity $V > \frac{q l B}{m}$
Path length of the particle in region II is maximum when velocity $V = \frac{q l B}{m}$
Time spent in Region II is same for any velocity V as long as the particle returns to Region I
All the above are correct

Answer:The correct answer is: All the above are correct

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