A beam of electrons is moving with constant velocity in a region having simultaneous perpendicular electric and magnetic fields of strength 20 Vm^-1 and 0.5 T respectively at right angles to the direction of motion of the electrons.

Then the velocity of electrons must be

(a) 8 m/s

(b) 20 m/s

(c) 40 m/s

(d) 1 m/s

Amit Saxena , 12 Years ago

Grade upto college level