What is EMF of a Cell?

Answer: The electromotive force of a cell, often known as the cell’s EMF, is the maximum possible distance between its two electrodes. It can be described as the difference in net voltage between the oxidation/reduction half-reactions. EMF measurements are mainly used to determine if an electrochemical cell is galvanic or not. The potential difference calculates the energy between two points on a circuit. 

The EMF is the most significant voltage the battery will generate, although the size of the potential difference is always smaller than the highest theoretical value of emf. EMF can be produced by electrochemical cells, thermoelectric devices, solar cells, photodiodes, electrical generators, transformers, and Van de Graaff generators. In nature, emf is created when magnetic field changes occur over a surface.