An electron is accelerated from rest by an electric field. After the acceleration, the electron is injected into a uniform magne
tic field of 1.27 times 10-3 T. The velocity of the electron and the magnetic field lines are perpendicular to one another. The electron remains in the magnetic field for 5.13 times 10-9 seconds. The angle (in radians) between the initial electron velocity and the final electron velocity is ____.
Explanation: the electron will move uniformly in circular path in magnetic field .
Let B be magnetic field , r be radius of circular path , v and ω be linear and angular velocity of electron , q and m be charge on electron and mass of electron