Question

What happens to the needle of a compass kept nearby when electric current is switched on in a wire? Why does this happens? explian this answer

Answer 1

Answer:

The current flowing in the wire gives rise to a magnetic field around it which exerts a force on the compass needle (which itself is a tiny magnet) kept nearby and deflects it from its North – south position.

Explanation:

Answer 2

Answer:

north - south deflections

Explanation:

if current flows through +ve terminal, north - south

if current flows through - ve terminal, west - east