Question

A current flowing in a wire always give rise to a ____________round it.

Answer 1

1. The current flowing through a conductor has always a magnetic field around it.
2. This can be detected by bringing a magnetic needle near a conductor carrying current which in turn shows deflection.
3. This shows that the magnetic field is present always around a current-carrying conductor.

Hence, a current flowing in a wire always gives rise to a magnetic field around it.