Question

State the rule to find out the direction of the magnetic field inside and around the circular loop.

Answer 1

The direction of the magnetic field inside and around a current-carrying circular loop is determined using the Right-hand thumb rule.

Imagine that you are holding a current-carrying straight conductor in your right hand such that the thumb points towards the direction of current. Then your fingers will wrap around the conductor in the direction of the field lines of the magnetic field. This is known as the right-hand thumb rule.