Electricity

4. Electric current that flows in one direction only, as in batteries.
5. A switch that automatically turns off when the current is too high to prevent damage.
7. Circuit A circuit in which components are connected across the same voltage source, providing multiple paths for current.
12. The unit of electrical resistance.
13. A temporary magnet created by running current through a coil of wire around an iron core.
14. A large discharge of static electricity in the atmosphere.
16. A device that converts chemical energy into electrical energy to provide a voltage source.
19. A material that allows electric charge to flow easily, such as copper or aluminum.
20. A device that can open or close a circuit, controlling the flow of electricity.
21. A device that changes the voltage of an alternating current (AC).
22. A device that consumes electrical energy, such as a light bulb or motor.
23. A machine that converts the movement of fluids (water, steam, or air) into mechanical energy.

1. The buildup of electric charge on a surface.
2. The opposition to the flow of electric current, measured in ohms (Ω).
3. Flow of electric charge in a circuit, measured in amperes (A).
6. Electric current that reverses direction periodically, used in power grids.
8. The potential difference between two points in a circuit, measured in volts (V).
9. A safety device that melts when the current is too high, breaking the circuit.
10. A low-resistance connection that allows a large current to flow, often causing overheating.
11. The rate at which electrical energy is used, measured in watts (W).
15. A material that resists the flow of electric charge, such as rubber or glass.
17. A device that converts mechanical energy into electrical energy.
18. Providing a path for electric charge to safely flow into the earth.
20. Circuit A circuit in which components are connected end-to-end, so the same current flows through each component.