Conductors and insulators
Circuit diagrams
Electrical current
Is the flow of charge. Electric charge is measured in coulombs (C). It can't be used up. Coulombs are measured using an ammeter in a series circuit. Current flows from positive to negative
Voltage/potential difference
Is measured in Volts (V). It is measured using a voltmeter in parallel.
Resistance
Resistance is measured in ohms. The higher the resistance longer and thinner wires. Higher resistance means lower current
Electrical safety
- Don't put your hands In a socket
- Make sure the socket is switched off when not in use