1. Chapter 3
Magnetism

2. 1. The two ends of a solenoid act like- Poles of a magnet

3. 2. Magnetic poles that are alike- Repel each other

4. 3. You can increase the strength of an electromagnet’s field by- Using a stronger ferromagnetic material for the core

5. 4. As Earth’s magnetic poles move, the magnetic declination in a given location will- Change

6. 5. An electric current produces a- Magnetic field

7. 6. Magnetic poles that are unlike- Attract each other

8. 7. A device uses to measure small currents is a- Galvanometer

9. 8. Every magnet, regardless of its shape, has two- Magnetic poles

10. 9. What is one difference between a galvanometer and an electric motor
9. What is one difference between a galvanometer and an electric motor? A galvanometer uses an electric current

11. 10. To reverse the direction of current in a motor, current is conducted- Through the commutator to the armature

12. 11. What device transforms electrical energy into mechanical energy
11. What device transforms electrical energy into mechanical energy? An electric motor

13. 12. Magnetic field lines around a bar magnet- Spread out from one pole and curve around another.

14. 13. The type of current produced by a battery is- direct current

15. 14. A device that increases or decreases voltage is called a- transformer

16. 15. Electric current from a generating plant is- Direct current transmitted at high voltages, but usually used at low voltages

17. 16. A solenoid with a ferromagnetic core is called an- electromagnet

18. 17. A generator transforms- Mechanical energy into electrical energy

19. 18.An magnet is any material that attracts iron and materials that contain iron.

20. 19.A solenoid with a ferromagnetic core is called an electromagnet.

21. 20. To generate electricity at an electric company, a turbine is attached to the armature of a generator.

22. 21. A current consisting of charges that flow in one direction only is called a direct current.

23. 22. A galvanometer is a device currents that measures small magnetic fields.

24. 23. A magnetic field is produced around a wire through which a current flows.

25. 24. A step-up transformer is a transformer that increases voltage.

26. 25. A maglev train floats above its rails due to magnetism.

27. 26. The distance that the pointer of a galvanometer moves depend on the amount of currents in the loops of the armature.

28. 27. When a wire moves up and down repeatedly in a magnetic field, an alternating current is induced in the wire.

29. 28. An electromagnet is a strong magnet that can be turned on and off.

30. 29. When placed near each other, unlike magnetic poles attract each other.

31. 30. A magnetic field is the region of magnetic force around a magnet.