Science E and M

5. the relationship between electricity and magnetism
9. strong temporary magnet made by inserting an iron core into a wire coil and passing an electric current
12. a material that does not allow heat or electrons to move through it easily
13. an electrical circuit where the current has only one path. if the path is interrupted in any point, it stops current flow in the entire circuit
15. a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons
16. the two ends of a piece of magnetic material where the magnetic forces are strongest, labeled north pole and south pole.
17. a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons
18. a material that allows electrons or electricity to another object
19. an area surrounding an electron that exerts a force on anything nearby with an electric charge; strongest nearest the electron and weakens with distance
20. A property of some materials in which there is a force of repulsion or attraction between certain like and unlike poles.

1. the rate of flow of electrons in a conductor
2. Electrical potential variance measured in volts.
3. a coil of wire with a current that acts a bar magnet
4. a device that uses electromagnetic induction to induce electrical current by rotating loops of wire through a magnetic field
6. motor a device that contains a rotating electromagnet that changes electrical energy to mechanical energy
7. a force produced when magnetic poles interact
8. a device that can increase or decrease the voltage of an alternating current
10. an electrical circuit where the current flows through more than one path. if one path is interrupted, current will still flow through the other paths
11. the opposition to the flow of electrons through a conductor, measured in ohms
14. The region around a magnet where magnetic forces act.