E&M review

4. a coil of wire with a current that acts a bar magnet.
7. You change to increase strength, change direction, or turn off.
10. A device that can increase or decrease the voltage of an alternating current.
12. A material that does not allow heat or electrons to move through it
15. the relationship between electricity and magnetism.
16. An electrical circuit where the current has only one path. If the
17. An electrical circuit where the current flows through more than one path. If one path is interrupted, current will still flow through the other paths.
19. in ohms.

1. The opposition to the flow of electrons through a conductor;
2. A material that allows electrons to move easily through it.
3. a force produced when magnetic poles interact.
5. A property of some materials in which there is a force of repulsion or attraction between certain like and unlike poles.
6. A device that uses electromagnetic induction to induce electrical current by rotating loops of wire through a magnetic field.
8. the force behind each charge pushing it.
9. The two ends of a piece of magnetic material where the magnetic forces are strongest, labeled north pole and south pole.
11. The region around a magnet where magnetic forces act.
13. Strong temporary magnet made by inserting an iron core into a wire coil and passing an electric current through the coil.
14. A device that contains a rotating electromagnet that changes electrical energy to mechanical energy.
18. is interrupted in any point, it stops current flow in the entire circuit.