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(m u)/(qB)` means `dgtR`
`thereforet=(T)/(2)=(pim)/(qB)`

(ii) `sintheta=(d)/(R)`
`theta=sin^(-1)((d)/(R))`
`omega=thetarArrt=(m)/(qB)sin^(-1)((d)/(R))`