1.

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.            \[8m{{s}^{-1}}\]
Answer» D.            \[8m{{s}^{-1}}\]


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