Question

42. An electron (mass = 9.1 x10-31 kg, charge = 1.6x10-1°c) experiences no deflection, if subjected to an electric field of 3.2x105 V/m, and a magnetic field of 2.0 x10-3 Wb/m2. Both the fields are normal to the path of electron and to each other. If the electric field is removed, then the electron will revolve in an orbit of radius :
(a) 45 m
(b) 4.5 m
(C) 0.45 m
(d) 0.045 m​

Answer 1

Explanation:

option C is our choice.. as shown in the above pattern we can solve the problem