Ans: We can determine the direction of the magnetic field around a current-carrying wire by following a guideline known as the “right-hand thumb rule.” Here’s how it works:
- Stick out your right hand with your thumb pointing in the direction of the electric current, which is the flow of charged particles like electrons.
- Now, curl your fingers. The direction your fingers curl tells you the direction of the magnetic field around the wire.
So, if you use your right hand and your thumb points in the direction of the current, the curling of your fingers will show you how the magnetic field wraps around the wire.