A proton of charge `e` and mass `m` enters a uniform magnetic field `B = Bi` with an initial
Channel: Doubtnut
Date: 2020-07-12

A proton of charge `e` and mass `m` enters a uniform magnetic field `B = Bi` with an initial velocity `v=v_xhati+v_yhatj`. Find an expression in unit vector notation for its velocity at time `t`.