science

3. a material such as glass or porcelain with negligible electrical or thermal conductivity
4. meter that measures the potential difference between two points
8. electric current is directly proportional to voltage and inversely proportional to resistance; I = E/R
10. the lines of force surrounding a permanent magnet or a moving charged particle
12. fastening electrical equipment to earth
15. any mechanical force that tends to oppose motion
19. a field of force surrounding a charged particle
22. an electrical device that provides a path for electrical current to flow
23. a flow of electricity through a conductor

1. a motor that converts electricity to mechanical work
2. the entire frequency range of electromagnetic waves
5. a device that attracts iron and produces a magnetic field
6. a device that trips like a switch and opens the circuit when overloaded
7. the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts
9. attraction for iron; associated with electric currents as well as magnets; characterized by fields of force
11. an electrical device that can interrupt the flow of electrical current when it is overloaded
13. engine that converts mechanical energy into electrical energy by electromagnetic induction
14. 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
16. electricity produced by friction
17. a device designed to transmit electricity, heat, etc.
18. electrical conduction through a gas in an applied electric field
20. measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign
21. a meter that measures the flow of electrical current in amperes