Question

What is emf(electromotiveforce)

Answer 1

Electromotive force, abbreviated emf (denoted {\displaystyle {\mathcal {E}}} and measured in volts),[1] is the electrical intensity or "pressure" developed by a source of electrical energy such as a battery or generator.[2] A device that converts other forms of energy into electrical energy (a "transducer") provides an emf at its output.[3] (The word "force" in this case is not used to mean mechanical force, as may be measured in pounds or newtons.)

Answer 2

Emf is the maximum potential difference between two ends of conductor when there is no current drawing or simply u can say that the circuit is open.