Across
- 1. a field of force surrounding a charged particle
- 6. electricity produced by friction
- 10. a device that trips like a switch and opens the circuit when overloaded
- 11. engine that converts mechanical energy into electrical energy by electromagnetic induction
- 12. a flow of electricity through a conductor
- 15. the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts
- 17. a material such as glass or porcelain with negligible electrical or thermal conductivity
- 18. a device that attracts iron and produces a magnetic field
- 19. a motor that converts electricity to mechanical work
- 20. electrical conduction through a gas in an applied electric field
- 23. 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
Down
- 2. a device designed to transmit electricity, heat, etc.
- 3. the lines of force surrounding a permanent magnet or a moving charged particle
- 4. any mechanical force that tends to oppose motion
- 5. a meter that measures the flow of electrical current in amperes
- 7. measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign
- 8. fastening electrical equipment to earth
- 9. an electrical device that provides a path for electrical current to flow
- 13. attraction for iron; associated with electric currents as well as magnets; characterized by fields of force
- 14. meter that measures the potential difference between two points
- 16. electric current is directly proportional to voltage and inversely proportional to resistance; I = E/R
- 21. the entire frequency range of electromagnetic waves
- 22. an electrical device that can interrupt the flow of electrical current when it is overloaded