Question

State and explain the Clock face rule for determining the polarities of a circular wire carrying current.

Answer 1

According to the clock face rule, we look at one face of a circular wire (or coil) through which a current is passing:
(i) if the current around the face of the circular wire(or coil) flows in the clockwise direction, then that face of the circular wire will be South pole(s-pole)
(ii) if the current around the face of the circular wire(or coil) flows in the anti-clockwise direction, then that face of the circular wire will be North Pole(N-pole)