# What is the difference between EMF and potential difference?

## What is the difference between EMF and potential difference?

The emf (electromotive force) is the the potential difference between the terminals of a battery when no current is flowing through an external circuit when the circuit is open.Potential difference is the voltage across the terminals of the battery when the current is being drawn from it to an external.

## What is the difference between terminal voltage and EMF of a cell?

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 emf and terminal voltage?

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.