The EMF or electromotive force is the energy supplied by a battery or a cell per coulomb (Q) of charge passing through it. The magnitude of emf is equal to V ( potential difference ) across the cell terminals when there is no current flowing through the circuit.
EMF of a Cell: The maximum potential difference which is present between two electrodes of a cell is defined as the electromotive force of a cell or EMF of a cell. It’s also known as the net voltage between the half-reactions of oxidation and reduction.The EMF (electromotive force) of a cell is the maximum potential difference between two electrodes of a cell. EMF is measure by combining two separate half cells. The \text {E}^ {\varnothing} of individual half cells can also be used to predict overall chemical reactions. Cell Potentials. The emf is a measure of how much energy the cell transfers per unit of charge passing through it. Cells transfer energy to the charges, allowing them to flow around the circuit. So, the emf of a cell can produce a current in a circuit. We can connect multiple cells together. One way to do this is to connect them in series.