An electron moving with a velocity = 5.0 × 10 7 m/s enters a region of space where perpendicular electric and a magnetic fields are present. The electric field is = . What magnetic field will allow the electron to go through the region without being deflected?

The magnetic field is T

Explanation:

Given:

Velocity of electron

Electric field

The force on electron in magnetic field is given by,

                       ......(1)

The force on electron in electric field is given by,

                                ......(2)

Compare both equation,

Here

  T

Therefore, the magnetic field is T

an electric circuit