In a closed loop of an electrical circuit, the sum of e.m.fs is equal to the sum of the p.ds.
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Internal Resistance
The resistance of a source of emf (eg. a cell) due to its construction, which causes a loss in energy / voltage as the charges pass through the source, symbol r.
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Lost Volts
The potential difference across the internal resistor of a source of emf.
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Terminal p.d.
The potential difference across an electrical power source - when there is no current this is equal to the emf of the source, but if there is a current in the source, this is equal to the emf minus the lost volts.
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Potential Divider
An electrical circuit designed to divide the potential difference across two or more components (often 2 resistors) in order to produce a specific.
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Potentiometer
An electrical component with three terminals and some form of sliding contact that can be adjusted to vary the potential difference between 2 of the terminals.
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Other cards in this set
Card 2
Front
The resistance of a source of emf (eg. a cell) due to its construction, which causes a loss in energy / voltage as the charges pass through the source, symbol r.
Back
Internal Resistance
Card 3
Front
The potential difference across the internal resistor of a source of emf.
Back
Card 4
Front
The potential difference across an electrical power source - when there is no current this is equal to the emf of the source, but if there is a current in the source, this is equal to the emf minus the lost volts.
Back
Card 5
Front
An electrical circuit designed to divide the potential difference across two or more components (often 2 resistors) in order to produce a specific.
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