Live wire changes passes along an AC current and is the most dangerouse
Neutral wire returns the electricity to the generator and is generally kept at 0 V
Earth wire- its a safety wire which connect the metal part of the appliance to the earth and stops it becoming live .
Some appliances dont have an earth wire as they are double insulated
Power is the rate of energy conversion (per second)
P=IV
power is measured in W or J/s
Fuses are included in a plug as a weak link for safety and incase of a fault and too much current flows, a thin wire will melt to prevent any further damage.
Always connected with live wire as its the most dangerouse
A circuit breaker is an automatic switch which turns off when the current rises above a specific value. It can be reset
Electrical Unit: kWh
E=Pt (J)(W)(s) & (kWh)(kW)(h)
Conductors have free electrons which allow a current to flow