Question

if magnetic field is applied parallel to the direction of electron beam the electron will be deflect or not?​

Answer 1

Answer:

Yes

Explanation:

The effect on an electron beam as it passes through a uniform magnetic field is the totality of the effects on each individual electron in the beam, and the electrons effects on each other.

This depends on the exact details of the beam energy and geometry, as well as the strength and orientation of the magnetic field. In general, you would expect a well collimated beam to be deflected. This is how a CRT TV set works.