Question

Suggest one way of distingwish a wire carrying current from a wire carrying no current

Answer 1

Place a magnet near the wires the one which shows attraction or replusion is the one carrying current since current carrying wire will produce magnetic field.

Answer 2

Suggest one way of discrimation a wire carrying current from a wire carrying no current?

A current carrying wire will produce a deflection in needle as it poses a magnetic field.

Whereas, no current carrying wire will not produce any deflection in needle as it do not poses magnetic field.