Question

A uniform magnetic field is directed from west to east in a horizontal plane.An electron enters the field at right angles to it from North to South direction.The direction of the force acting on the electron will be

Answer 1

Explanation:

We know that both the directions are perpendicular, thus for force direction=?

Using Fleming's left hand rule,

Direction of force is perpendicular to the direction of magnetic field and current.

Thus direction of force is opposite to electron motion into the page at 90°