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