What do you need to create an electromagnet?
1. Current, Coil, Conductor
2. Coulomb, Coil, Charge
3. Conductor, Coil, Core
4. Core, Coil, Charge
1. Current, Coil, Conductor
2. Coulomb, Coil, Charge
3. Conductor, Coil, Core
4. Core, Coil, Charge