Need help on Electricity and Magnetism Quiz JUST 3 Q's

1. A current-carrying wire wrapped around an iron ore is called a(n) ____. (1 point)
generator
conductor
transformer
electromagnet
2. Changing the current changes the ____ of an electromagnet. (1 point)
strength
direction
charge
both a and b
3. The function of an electric motor is to change ____. (1 point)
chemical energy into electrical energy
electrical energy into chemical energy
electrical energy into mechanical energy
mechanical energy into electrical energy

electromagnet, strength,into mechanical