Review

3. A device used to measure electric current; it must be connected in series in a circuit.
5. A device that opens (breaks) or closes (completes) a circuit to control the flow of current.
7. The rate at which electrical energy is transferred or used, measured in watts (W).
9. Current (DC): Electric current that flows in only one direction, such as from a battery.
12. A complete, closed path through which electric charges can flow.
13. A resettable safety device that automatically opens a circuit when the current is too high.
15. The electric potential difference between two points that provides the “push” that moves charges through a circuit.

1. The flow of electric charge through a circuit, measured in amperes (amps).
2. The opposition to the flow of electric current in a material, measured in ohms (Ω).
4. A device used to measure electric potential difference (voltage); it must be connected in parallel across a circuit element.
6. A unit of power equal to 1,000 watts; used in calculating electrical energy consumption (kWh).
8. A type of circuit in which components are connected one after another in a single path, so the same current flows through all components.
10. A type of circuit in which components are connected in separate branches, so current splits while voltage remains the same across each branch.
11. A safety device that melts and breaks a circuit when the current becomes too high.
14. A device that creates a potential difference by converting chemical energy into electrical energy.