Question

How is the direction of a magnetic field at a point determined?

How can the direction of magnetic field lines at a place be determined?

Answer 1

1. The direction of the magnetic field at a point can be determined using a small compass needle or the right-hand thumb rule.
2. If you hold a current-carrying conductor in your right hand with the thumb pointing in the direction of the current, your fingers curl in the direction of the magnetic field lines.