Electricity terms

3. An electrically controlled switch used to control high-power electrical loads.
5. A material used to prevent unwanted electrical current from flowing between conductors.
6. A material that allows electric current to flow easily.
9. The rate at which electrical energy is transferred or consumed.
11. The flow of electric charge through a conductor.
14. A device used to control the speed and torque of an AC motor by varying its frequency and voltage.
15. A protective device that melts and opens the circuit when excessive current flows.
16. The ratio between real power and apparent power in an AC electrical system.
17. A condition in which electrical equipment operates above its rated capacity.
20. The reduction in voltage that occurs as current flows through a conductor or electrical component.

1. A device that stores electrical energy in an electric field and can be used for power factor correction, filtering, and motor starting.
2. A protective device that automatically interrupts a circuit when excessive current is detected.
4. The opposition that a material offers to the flow of electric current.
7. The electrical potential difference that drives current through a circuit.
8. An unintended low-resistance connection that causes excessive current to flow.
10. A device that increases or decreases AC voltage through electromagnetic induction.
12. The connection of an electrical system to earth for safety and fault protection.
13. An electrically operated switch used to control another circuit.
18. An electrical system that uses three alternating voltages or currents with a phase difference of 120°.
19. A machine that converts electrical energy into mechanical energy.