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