A particle of mass m and charge q moves with a constant velocity v along the positive x direction.
Channel: Doubtnut
Date: 2020-08-30

A particle of mass m and charge q moves with a constant velocity v along the positive x direction. It enters a region containing a uniform magnetic field B directed along the negative z direction, extending from x = a to x = b. The minimum value of v required so that the particle can just enter the region x lt b is