Question

A current-carrying loop is held vertically such that the direction of current at the top of the loop is from South to North. A magnetic compass is kept horizontally at the centre of the loop. In which direction will the needle of the compass point?

• A. North
• B. South
• C. East
• D. West

Answer 1

The correct option is D West

We can get the direction of the magnetic field around any current-carrying conductor using the right hand thumb rule.
In the given scenario, the direction of current at the top of the loop is from south to north. As per the right hand thumb rule, the direction of the magnetic field at the centre of the loop is from east to west.
Hence, the magnetic compass placed at the centre of the loop will point towards the west.