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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Section 4 b) Summary
The nine types of energy important to learn are: Electrical energy Light Sound Kinetic Nuclear Thermal Gravitational Chemical ...
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3.10 understand that light is part of a continuous electromagnetic spectrum which includes radio, microwave, infrared, visible, ultraviolet... -
3.2 understand the difference between longitudinal and transverse waves and describe experiments to show longitudinal and transverse waves i... -
Conductor: A material that allows current to flow through it due to free charged particles. Earthed: When an object allows its charge to f...
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