MAGNETISM

1. The unit of magnetic field strength is named for this inventor.
3. A magnetic device created by a combination of a solenoid and ferrous metal.
7. A current carrying solenoid creates a magnetic field similar to this object.
11. This device is used in a DC motor to change the direction of current flow and, subsequently, the poles of the armature.
12. The property of metals that can attract iron or steel.
14. A coil of tightly wrapped wire used to create a magnetic field strong enough to move a plunger positioned inside the coil.
15. The armature of this device rotates in a magnetic field converting electrical energy into rotational mechanical energy.
17. Current created by a moving magnetic field.
20. Your fingers will curl naturally in the direction of the magnetic flux when your thumb is pointed in the direction of conventional current flow.

2. This type of motor would be damaged by running it on the wrong frequency.
4. The stationary part of a motor or generator.
5. A motor capable of operating on either AC or DC.
6. This simple device can be used to detect the presence of a magnetic field.
8. A force field near a magnetic pole.
9. The “to and fro” movement of a speaker is due to this type of electrical current.
10. Imaginary lines indicating the direction of a magnetic field.
13. This scientist first discovered the connection between electricity and magnetism.
16. Electric charges can be isolated, but magnetic _____ cannot.
18. The magnetic field created by a current carrying wire or coil is directly proportional to this electrical quantity.
19. The rotating coil in a generator or motor.