When an electron enters a magnetic field, it will accelerate up the field. True OR False

True

Explanation:

The force on the electron when it enters in a magnetic field is given by

F = q (v x B)

F = - e x V x B x Sin∅

here, F is the force vector, B be the magnetic field vector and v be the velocity vector.

If the angle between the velocity vector and the magnetic field vector is 0 degree, then force is zero.

When the electrons enters in the magnetic field at any arbitrary angle, it experiences a force and hence it accelerate up.