Question

When the current is switched on through a wire,a compass needle kept nearby gets deflected from its north-south position. Explain​

Answer 1

When an electric current passes through a wire, it behaves like a magnet. This magnetic effect of the electric current makes the compass needle deflect from the north-south direction.

I hope its hopeful.

Answer 2

We know that needle of a compass is itself a tiny magnet which points in north south direction. When we being a magnet close to it, the needle gets deflected.When electric current passes through a wire it also behave like a magnet.And hence the needle of the compass will also be deflected.