Electricity Section 3

1. Coil of insulated wire that becomes a magnet when current flows through it
3. Energy does not just appear or disappear, it can only be transformed from one form to another
4. The ratio of useful energy to total energy
9. Device that changes electricity from one voltage to a different voltage
10. Electromagnetic ____: Generation of electric current in a conductor by a changing magnetic field
13. A device that can convert thermal energy to electrical energy
16. ____Energy: The energy due to an object’s motion or its potential to move
17. The unit of power
19. The unit of energy
20. The ability to do work

2. Electricity flows back and forth 60 times per second
5. Mechanism that makes electrical contact with the moving commutator in a motor
6. Rotating shaft and coil in a motor or generator
7. Electricity flows in only one direction
8. ____Energy: Stored energy of an object because of its relative position
11. The unit for energy for larger numbers of joules
12. ____Energy: The total kinetic energy of all the particles in a substance
14. The rate at which a device converts energy
15. ____Energy: The energy of charged particles
18. ____Energy: The energy stored in chemicals