Physics Chapter 20,21

4. what makes the sound in the electric bell
8. made by passing a current through a coil of wire
10. device that transforms electrical energy into kinetic energy
11. there are two of them used to create a steady magnetic field passing through the coil
12. coil that provides the voltage to the external circuit in a transformer
15. what strikes the gong in a electric bell
17. they guarantee uninterrupted power transmission for machinery
18. a place that transforms voltage from high to low, or the reverse(link between power lines and distribution lines)
20. cables that carry distribute electricity around the country

1. the main structure of a transformer made from thin sheets of metal
2. person after which the hand rules are named
3. switch operated by an electromagnet
5. devices that convert chemical energy directly into electrical energy
6. used to connect the alternating current to the external circuit( in a a.c.generator)
7. the incmoning voltage in a transformer is connected across this coil
9. reverses the current flowing through the coil in an electric motor
13. shortcut for the alternating current
14. component that limits or regulates the flow of electrical current in an electronic circuit
16. a device used to increase or decrease the voltage
17. a coil of wire
19. made to spin by the high-pressure steam from the boiler