Vocab

6. attraction for iron; associated with electric currents as well as magnets; characterized by fields of force
8. measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign
9. electrical conduction through a gas in an applied electric field
12. a device that trips like a switch and opens the circuit when overloaded
13. the entire frequency range of electromagnetic waves
15. a device that attracts iron and produces a magnetic field
16. any mechanical force that tends to oppose motion
18. a device designed to transmit electricity, heat, etc.
20. electricity produced by friction
21. the lines of force surrounding a permanent magnet or a moving charged particle
22. an electrical device that can interrupt the flow of electrical current when it is overloaded
23. a motor that converts electricity to mechanical work

1. phenomenon exhibited by materials like iron (nickel or cobalt) that become magnetized in a magnetic field and retain their magnetism when the field is removed
2. fastening electrical equipment to earth
3. a meter that measures the flow of electrical current in amperes
4. engine that converts mechanical energy into electrical energy by electromagnetic induction
5. a material such as glass or porcelain with negligible electrical or thermal conductivity
7. the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts
10. a field of force surrounding a charged particle
11. electric current is directly proportional to voltage and inversely proportional to resistance; I = E/R
14. a flow of electricity through a conductor
17. meter that measures the potential difference between two points
19. an electrical device that provides a path for electrical current to flow