Magnetic field strength, B = 6.5 × 10−4 T
Charge of the electron, e = 1.6 × 10−19 C
Mass of the electron, me = 9.1 × 10−31 kg
Velocity of the electron, v = 4.8 × 106 m/s
Radius of the orbit, r = 4.2 cm = 0.042 m
Frequency of revolution of the electron =
Angular frequency of the electron =ω = 2 πv
Velocity of the electron is related to the angular frequency as: v=rω
In the circular orbit, the magnetic force on the electron is balanced by the centripetal force.
Hence, we can write:
