1.  Magnet: A piece of iron or steel that attracts other pieces or iron or steel

2. Artificial magnet: Magnet created by rubbing a piece of soft iron against another magnet

3. Electromagnet: magnet created by passing a current through a coil of wire

4. Magnetism: The property of a magnet

5: Domains: Group of atoms arranged in the form of a magnet

6. Flux lines: Lines of force that surround a magnet

7. Permeability: The ability of a material to accept magnetic lines of force.

8. Retentivity: The ability of a magnet to retain its magnetic field after the magnetizing force is removed.

9. Faraday's Law: The basic law of electromagnetism - the induced voltage in a conductor is directly proportional to the rate at which the conductor cuts the magnetic lines of

     force.

11. Relay: An electromagnetic switch that opens and closes an armature.

12. Solenoid: a cylindrical coil with a movable plunger in the center of the coil

Questions

1. The domain theory states that when a material is magnetized its domains align in a common direction and the material becomes a magnet.

2. The number of turns in a coil; the amount of current flowing through the coil; the insertion of a ferromagnetic core in the center of the coil.

Lab 1-26 in workbook: Inductance

Definitions

1. Inductance: The property of a coil that pervents changes in current flow.

2. Henry: The unit of capacitance

3. Inductor: A device designed to have a specific inductance.

4. Choke: A laminated core inductor

5. Time constant: The time relationship between inductance and resistance in a circuit.

Questions

1.  L

2. Henry

3. H

4. Same as resistor with curves instead of points

5. Same as 4 above with two horizontal lines above