question_answer

One proton beam enters a magnetic field of \[{{10}^{-4}}\]T normally, Specific charge = \[{{10}^{11}}\,C/kg.\] velocity = \[{{10}^{7}}\,m/s\]. What is the radius of the circle described by it        [DCE 1999]

A)            0.1 m                                       

B)            1 m

C)            10 m                                        

D)            None of these