Question

an electron beam passes through a REGION OF CROSSED ELECTRIC AND MAGNETIC FIELDS OF INTENSITIES E B RESPECTIVELY. FOR WHAT VALUE OF THE ELECTRON SPPED WILL THE ELECTRON BEAM REMAIN UNDEFLECTED?

Answer 1

"When an electron beam is passed through the electric field and magnetic field then there were be total of two forces that will work on the beam.

One will be the electric force that is made due to the electric field and the other is the magnetic force developed due to the magnetic field.

Hence, the forces will be equal and opposite with no deflection in the beam.

Electric force = Magnetic force

qE = qvB

v = E/B

"