In a closed loop, the sum of the e.m.f.s is equal to the sum of the p.d.s (and also the IRs).
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Resistor circuits
2 or more resistors arranged to provide a specific resistance.
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Terminal p.d.
The p.d. across an electrical power source - when there is no current this is equal to the emf but if there is current this is equal to the emf - the lost volts (e-Ir)
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Lost volts
The p.d. across the internal resistor of a source of emf.
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Internal resistance
The resistance of a source of emf due to its construction which casues loss in energy/voltage as the charge passes through the source (r).
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Potential divider
An electrical circuit that divides the p.d. across 2 or more components in order to produce a specific output.
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Potentiometer
An electrical component with 3 terminals and sliding contact that can be adjusted to vary potential difference between the 2 terminals.
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Other cards in this set
Card 2
Front
2 or more resistors arranged to provide a specific resistance.
Back
Resistor circuits
Card 3
Front
The p.d. across an electrical power source - when there is no current this is equal to the emf but if there is current this is equal to the emf - the lost volts (e-Ir)
Back
Card 4
Front
The p.d. across the internal resistor of a source of emf.
Back
Card 5
Front
The resistance of a source of emf due to its construction which casues loss in energy/voltage as the charge passes through the source (r).
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