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What is the difference between terminal potential difference of a cell and terminal voltage of a battery?
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What is the difference between terminal potential difference of a cell...
The electromotive force (emf) is the potential difference of a source when no current is flowing. Terminal voltage is the voltage output of a device is measured across its terminals. Terminal voltage is calculated by V = emf - Ir.

ElectroMotive Force (emf) : It is the potential difference between the terminals of a cell when no current flows.
Terminal Voltage (simply Voltage, V) : It is the potential difference between the terminals of a cell when current flows.
Since a cell has an internal resistance that requires energy ( potential difference) to overcome, then the terminal voltage is always less than the ElectroMotive Force.
( V < emf ).
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What is the difference between terminal potential difference of a cell and terminal voltage of a battery?
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