Question

A beam of electrons is directed into uniform electric and magnetic feilds that are at right angles to one another and to the beam direction. The strength of the magnetic feild is 55 mT; the electric feild strength is adjusted to 600 kV m^-1 when the beam passed through the feilds undeflected.

Calculate the speed of the electrons.

Answer 1

Bvq = Eq
v = E/B

Answer 2

Thank you