Distinguish between a common bar magnet and an electromagnet. What is the cause of a magnetic field about a common bar magnet? What is the cause of a magnetic fields in an electromagnet?
How are electric motors and electric generators similar? Different? How do they each make use of electromagnetic induction?
What does a transformer do? How does it make use of electromagnetic induction? What correction do you make to a friend who states that a step-up transformer boosts energy, while a step-down transformer reduces energy in a circuit?