Science Crossword

4. In some plug there are 3, in some plugs there are 4
5. What is energy measured in
7. All the lines of force around a magnet
8. What do magnets do when like poles are put together (for ex. South and South)
11. An electric current that constantly changes direction
13. The amount of push from the water pump
15. The name for the formula of V=IR
16. A device that is used to decrease or increase the voltage of alternating current
18. What do magnets do when opposite poles are put together (for ex. North and South)
19. A device or instrument used to measure electric current
20. A circuit where there is no branches

1. How good a device is at changing energy from one form to another
2. Does not conduct electricity
3. A device or instrument used to measure voltage
6. A circuit where there is branches
9. How much water is flowing
10. An electric current that flows only in one direction
12. A liquid inside a battery
14. Energy that has spreaded out into the surroundings because it is no longer useful therefore, it is not re-usable
17. A conductor through which electricity enters or leaves