Class 12 NEET Physics Moving Charges and Magnetism

Electric field (E)=20V∕m and magnetic field (B)=0.5T
The force on electron in a magnetic field =evB
Force on electron on an electric field =eE
since the electron is moving with constant velocity, therefore the resultant force on electronis zero.
i.e., eE=evB ⇒v=

E

B

=

20

0.5

=40 ms−1