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Level 30

Currents


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Potential difference
The amount of energy per 1C of charge that is needed to drive the charges through a component
Ammeter
Tool to measure the current in a circuit
Ampere
Unit of measurement for current
Current
Amount of charge that passes by a point in one second
Circuit
A closed loop that a current can flow through
Free electrons
Electrons that easily leave their atoms and move randomly in an object
Electromotive force (e.m.f.)
The potential difference (voltage) measured across a cell or battery. The amount of potential a unit of charge gains from the cell/battery.
electrolyte
liquid that contains ions
Volt
Unit of measurement for potential difference
Voltmeter
Tool used to measure the potential difference
In series
Connecting components in a circuit so that the current goes through each one, after another
In parallel
A circuit whose path divides into 2 (or more) paths, and then rejoin before completing the circuit
Battery
More than one cell connected in series
conventional current
The historically incorrect version of noting the direction of a current in a circuit. It points the direction that a positive charge would flow.
cell
a single unit that converts chemical energy into electrical potential energy
component
part of an electrical circuit
drift speed
speed of an electron due to the electric field
terminal
electrical end of a battery or electrical component