4.0 Current Carrying Loop

A current carrying loop behaves as a magnetic dipole. If we look the upper face of the loop and current is flowing anti-clockwise,then it has a north polarity and if current is flowing clockwise.then it has a south polarity.

Magnetic dipole moment of a current carrying loop is given by

$$M = IA$$

For $N$ such turns $M = NIA$

Where $I =$ current and $A =$ area of cross$-$section of the coil.