click below
click below
Normal Size Small Size show me how
7J Current Elect
Key words
| Term | Definition |
|---|---|
| Current | Flow of electricity (I) |
| Amp | Unit for measuring current (A) |
| Ammeter | Instrument for measuring current |
| Cell | Source of electricity from a battery |
| Component | A part of a circuit with a special function |
| Filament | Thin wire that glows when a bulb is on |
| Power pack | Source of electricity from the mains |
| Charges | Tiny particles that flow around a circuit |
| Parallel circuit | Circuit in which electrons have more than one path to take |
| Series circuit | Circuit in which there is only one path for electrons to take |
| Across | Connecting a circuit in parallel |
| Resistance | How difficult it is for electricity to flow |
| Resistor | A component that creates resistance |
| Variable resistor | A resistor whose resistance can be changed |
| Voltage | How much energy is transferred by electricity (V) |
| Volt | Unit of voltage (V) |
| Voltmeter | Instrument that measures voltage |
| Cable | Wire that runs off the mains and contains three separate wires |
| Cable grip | Plug that holds the wires in the pins |
| Circuit breaker | Devices that switches off electricity if current is too large |
| Earth wire | Green and yellow wire for safety |
| Live wire | Brown wire |
| Neutral wire | Blue wire |
| Fuse | Thin wire that protects a circuit from too much electricity |
| Fuse rating | Largest current a fuse can take before melting |
| Ring main | Type of parallel circuit used in house wiring |