Section 3: Electricity

2. SI Unit of power
4. The SI Unit of electrical resistance
5. Houses are wired in ___ circuits
6. Car batteries are about ___ volts
9. Charge is measured in ____, defined as the charge carried by 1 Ampere in 1 second
11. (charge x velocity) x magnetic field strength
12. When electrical energy is transformed into heat, light, radio waves, etc. the electrical circuit feels resistance
14. A huge solid magnet that acts to bend the charged particles to be accelerated
15. Like charges repel, while unlike charges ____
17. An apparatus for reducing or increasing the voltage of an alternating current
18. Any system that uses a low power input signal to control a higher power output

1. Energy per electron
2. Big speakers that move greatly but slowly for long, slow waves
3. Type of magnet in which the moving charges are electrons spinning around their axis
7. If you do anything that add electrons, you make the material a better ___
8. SI Unit of electric current
10. Type of current that is always the same and the pattern follows a straight line
13. Type of current that first goes one way, then reverses and has a pattern but is not a straight line
16. Small speaker that can move quickly for high frequency