Electricity and Magnetism

4. it is a very large magnet at its center and has two magnetic poles.
5. it is built to store a huge volume of water with a large drop in elevation.
7. another word for "lodestone".
9. region around the magnet where magnetic effects can be detected.
12. it is a simple application of induced emf.
13. materials that are not attracted by magnets.
15. unlike poles _______ each other.
17. Ancient _______ believe to have discovered the magnetic property possessed by certain types of naturally magnetized pieces of iron.
18. these are widely used in storing computer data.
20. it is a medical imaging technique that is used to investigate the anatomy and function of the body.

1. shortcut word for "binary digit".
2. a point in a combined magnetic field where there is no magnetic effect.
3. he was the first one to investigate the electromagnetic induction in 1831.
6. it means "leading stone".
8. it is an apparatus that converts electric energy to rotational kinetic energy.
10. it is used to plot magnetic field patterns.
11. old loudspeakers looks like a black cone with a frame fitted into a wooden body.
14. this means "electromotive force".
16. like poles _____ each other.
19. it is a device that converts mechanical energy to electrical energy.