Physics Chapter 24

2. This is a motor which runs by altering the current.
5. A device used for measuring small electric currents.
8. An invention most likely first made by the Chinese. It is an instrument containing a magnetized pointer that shows direction.
9. Having a high susceptibility to magnetization.
12. The formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges.
18. The number of field lines passing through a surface perpendicular to the lines.
19. Groups of atoms near each other that are magnetized.
21. The rotating colors of an electric motor.
22. to have a desire to be pulled together
23. This device converts direct current electrical energy into mechanical energy.
24. Segment includes both endpoints.
26. Energy that allows for action or movement.

1. He worked mainly with the principles underlying electromagnetic induction.
3. This is used to find the direction of a current flow.
4. Changes in direction or orientation of the magnetic field of the Earth that have occurred from time to time.
6. A force that is when objects move away from each other.
7. A grey magnetic material.
10. He voyaged extensively before the age of exploration began.
11. This is a special type of wife that has the ability to have electricity flow through it.
13. This is soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
14. A device that has the ability to produce energy.
15. Seafloor rocks that are magnetically stripped.
16. cylindrical coil of wire that works as a magnet when carrying electric current.
17. A magnet has two of these and they can eat her repel or retract each other.
20. Temporary magnets are magnetized by ________ .
25. He discovered that electric currents create magnetic fields.