Question

The path of the moving electron in the magnetic field is circular.why?​

Answer 1

When applying Fleming's rule to electrons, remember that the direction of the current is opposite to that of the electrons' motion. The electron follows a circular path, the magnetic force being the unbalanced force required to cause acceleration towards the centre of the circle.

Answer 2

Answer with Explanation:

As a charged particle, the electron moves in a circular motion in a magnetic field because of a magnetic force that is perpendicular to its movement/travel (also known as velocity). This force doesn't affect the moving electron except for its motion; thus, the electron remains at constant or uniform speed. This is according to Fleming's rule regarding electrons.

Remember that this happens provided that the charged particle will move at right angle to the area of magnetic field.