A particle having mass `m`, charge `q` enters a cylindrical region having
Channel: Doubtnut
Date: 2020-01-19

A particle having mass `m`, charge `q` enters a cylindrical region having uniform magnetic field `B` in the inward direction as shown. If the particle is deviated by `60^(@)` as it emerges out of the field then what is the time spent by it in the field?