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Browse key terms and definitions across all GCSE subjects. Search by keyword or filter by subject and exam board.
23,110 key terms
Elastic potential store
The energy store of an object that has been stretched or compressed and can return towards its original shape.
Elastomer
A rubber-like polymer that can recover its size and shape after being deformed.
Electoral pact
An agreement between parties about which candidates will stand, intended to avoid dividing their supporters' votes.
Electoral register
The official list of people registered to vote.
Electorate
The people entitled to vote in an election.
Electorate
The people entitled and registered to vote in a particular election.
Electrical and electronic equipment
Equipment that depends on electric currents or electromagnetic fields to work, or that generates, transfers or measures them.
Electrical appliance
A device designed to transfer energy electrically from a power supply to one or more energy stores.
Electrical audio signal
An electrical current or potential difference that varies with time to represent information such as sound.
Electrical charge
A quantity of electricity, measured in coulombs (C). In metal wires, moving electrons carry electrical charge.
Electrical conduction
The movement of electrical charge through a material.
Electrical conductivity
The ability of a material to allow electric charge to flow through it.
Electrical conductivity
A measure of how readily a material allows electric current to flow.
Electrical conductivity
How readily a material allows electric current to flow through it.
Electrical conductor
A material through which electrical charge can flow readily.
Electrical conductor
A material in which charged particles, usually electrons in a solid, are free to move.
Electrical conductor
A material that allows electrical current to pass through it readily.
Electrical energy transfer
The energy transferred by electrical work when charge passes through a component, measured in joules (J).
Electrical insulation
A material that resists the flow of electric current; covering a conductor with it helps prevent accidental contact.
Electrical insulation
Resistance to the passage of electric current.
Electrical insulator
A material through which electric current does not flow easily.
Electrical insulator
A material in which electric charge cannot move freely, so charge transferred to its surface tends to remain there.
Electrical insulator
A material with very high electrical resistance, used to prevent current flowing through unwanted paths.
Electrical insulator
A material that resists the flow of electric current, used to separate conductors and protect against unwanted electrical contact.
Electrical isolation
The separation of equipment from a source of dangerous potential difference.
Electrical isolation
The separation of circuits so that there is no direct conducting connection between them.
Electrically neutral
Having balanced positive and negative charge, so that there is no overall charge.
Electrically neutral
Having zero overall electric charge because positive and negative charges balance.
Electrical oscillation
A repeated variation in current or potential difference in an electrical circuit.
Electrical power
The rate at which energy is transferred, measured in watts.
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