Answer :
Answer:
When there is a current in a wire, a circular magnetic field is produced around the wire. This magnetic field can deflect the needle of a magnetic compass. The strength of the magnetic field is greater: closer to the wire.
Answer:
When there is a current in a wire, a circular magnetic field is produced around the wire. This magnetic field can deflect the needle of a magnetic compass. The strength of the magnetic field is greater: closer to the wire.