question_answer

An electron enters a region where electrostatic field is 20N/C and magnetic field is 5T. If electron passes undeflected through the region, then velocity of electron will be  [DPMT 2002]

A)            \[0.25m{{s}^{-1}}\]            

B)            \[2m{{s}^{-1}}\]

C)            \[4m{{s}^{-1}}\]                  

D)            \[8m{{s}^{-1}}\]