question_answer

A beam of ions with velocity \[2\times {{10}^{5}}\,m/s\] enters normally into a uniform magnetic field of \[4\times {{10}^{-2}}\,tesla\]. If the specific charge of the ion is \[5\times {{10}^{7}}\,C/kg\], then the radius of the circular path described will be                                         [NCERT 1983; BVP 2003]

A)            0.10 m                                     

B)            0.16 m

C)             0.20 m                                    

D)            0.25 m