Answer :
electromotive force is a measurement of the energy that causes current to flow through a circuit.it can be also defined as the potential difference in charge between two points in a circuit.it is also known as voltage and is measured in volts.
The electromotive force is the maximum potential difference between two electrodes of a galvanic or voltaic cell. The quantity is related to the tendency for an element, a compound or an ion to acquire or release electrons.