Alternating current: Current is constantly changing direction
Circuit breaker: An electrical safety device that will trip and break a circuit if too much current is flowing through. Use electromagnets to trip the switch and can be reset.
Conductor: A material that can easily transmit electrical energy, so aqueous/molten ionic compounds and metals, due to the free charged particles allowing current to pass through.
Double insulation: Two layers of insulation of a product, e.g. a plastic coated kettle. Greatly reduces chances of electric shock in event of fault.
Earth wire: Provides a path of least resistance to earth for high voltage currents in event of a fault.
Fuse: A thin wire that will melt when too much current flows through due to heating effect. Electrical safety device, requires replacement.
Insulator: A material that does not transmit electrical energy easily.
Mains electricity: A.c., 230V : the electricity that enters each home.
Resistance: Slows the flow in a circuit down. Causes a heating effect.
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