Question

The diagram shows a beam of electrons about to enter a magnetic field. The direction of the field is into the page. 

What will be the direction of deflection, if any, as the beam passes through the field?

Answer 1

Direction of current is from right to left as electron beam enters from left to right and magnetic field is into the page. So, according to Fleming’s left hand rule, force is perpendicular to the flow of current and in its left side. So, electron beam deflects towards bottom of the page.