A copper nail, wire, and battery make what?

A Weaker battery

B Permanent magnet

C Stronger battery

D Electromagnet

1 answer

The combination of a copper nail, wire, and a battery can create a D: Electromagnet. When the wire is wrapped around the nail and connected to the battery, current flows through the wire, generating a magnetic field and magnetizing the nail, which acts as a core for the electromagnet.