Take a bar magnet and bring it near the T.V screen . What do you observe?

Explanation

This is due to the fact that magnetic field exerts a force on the moving charge.
TV screen Activity:
1) Take a bar magnet and bring it near the TV screen.
2) Then the picture on the screen is distored.
3) Here the distortion is due to the motion of the electrons reaching the screen are affected by the magnetic field.
4) Now move the bar magnet away from the screen.
5) Then the picture on the screen stabilizes.
6) This must be due to the fact that the magnetic field exerts a force on the moving charges. This force is called magnetic force.
7) The magnitude of the force is F = Bqv where B is magnetic induction 'q' is the charge and v is the velocity of the charged particle.