A uniform mangetic field of strength B exists in a region of width d. A particle of charge q and mass m is shot perpendicularly (as shown in Fig. ) into the magnetic field. Find the time spent by the particle in the magnetic field if
(a) `dgt (m u)/(qB)`
(b) `dlt (m u)/(qB)`

Explanation

(i) `dgt(mu)/(qB)` means `d gt R`
`:.t=T/2=(pim)/(qB)`
(ii) `sin theta=d/R`
`theta=sin^(-1)(d/R)`
`omegat=theta rArr t=m/(qB)sin^(-1)(d/R)`