Vocabulary

1. attraction for iron; associated with electric currents as well as magnets; characterized by fields of force
4. a material such as glass or porcelain with negligible electrical or thermal conductivity
6. a device that trips like a switch and opens the circuit when overloaded
9. an electrical device that can interrupt the flow of electrical current when it is overloaded
10. electricity produced by friction
12. measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign
15. any mechanical force that tends to oppose motion
16. a device that attracts iron and produces a magnetic field
17. a device designed to transmit electricity, heat, etc.
18. fastening electrical equipment to earth

2. a meter that measures the flow of electrical current in amperes
3. the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts
5. electrical conduction through a gas in an applied electric field
7. meter that measures the potential difference between two points
8. a field of force surrounding a charged particle
11. a flow of electricity through a conductor
13. an electrical device that provides a path for electrical current to flow
14. electric current is directly proportional to voltage and inversely proportional to resistance; I = E/R