The magnetic field produced by a straight current-carrying conductor is in the form of concentric circles.

What is the shape of the magnetic field lines around a circular current-carrying conductor?

Draw a diagram to show how a magnetic needle deflects when it is placed above or below a straight conductor carrying current,depending on the direction of the current in the conductor.

Differentiate between $AC$ and $DC$ along with the graph.

The direction of magnetic field lines in a region outside the bar magnet is $.....$

Define magnetic field. Describe an activity to draw magnetic field lines around a bar magnet from one pole to another pole.