question_answer

Electrons move at right angles to a magnetic field of \[1.5\times {{10}^{-2}}\]Tesla with a speed of \[6\times {{10}^{7}}m/s.\]If the specific charge of the electron is \[1.7\times {{10}^{11}}\]C/kg. The radius of the circular path will be                                                         [BHU 2003]

A)            2.9 cm                                     

B)            3.9 cm

C)            2.35 cm                                   

D)            3 cm