Electricity and Magnetism

2. an electrical device that provides a path for electrical current to flow
4. field the lines of force surrounding a permanent magnet or a moving charged particle
9. field a field of force surrounding a charged particle
11. measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign
13. meter that measures the potential difference between two points
16. an electrical device that can interrupt the flow of electrical current when it is overloaded
17. engine that converts mechanical energy into electrical energy by electromagnetic induction
18. fastening electrical equipment to earth
20. a device that trips like a switch and opens the circuit when overloaded
21. electric current is directly proportional to voltage and inversely proportional to resistance; I = E/R
22. 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
23. a device designed to transmit electricity, heat, etc.

1. electricity produced by friction
3. any mechanical force that tends to oppose motion
5. a device that attracts iron and produces a magnetic field
6. electrical conduction through a gas in an applied electric field
7. a motor that converts electricity to mechanical work
8. the entire frequency range of electromagnetic waves
10. the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts
12. attraction for iron; associated with electric currents as well as magnets; characterized by fields of force
14. a flow of electricity through a conductor
15. a material such as glass or porcelain with negligible electrical or thermal conductivity
19. a meter that measures the flow of electrical current in amperes