Which of the following force fields will deflect electron beams? magnetic electrical gravitational

Electrons re deflected by both electrical and magnetic fields.

Explanation:

When an electron enters in magnetic field at any arbitrary angle Θ, the magnetic force experiences by electron is given by

So, electron experiences a force and deflects.

When an electron enters into electric field, the force experiences by the electron is given by

So, electron also experiences a force and deflects.

the answer is b ) square root of 5