Vocabulary
Across
- 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
Down
- 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