What is e.m.f . Of cell ? On what factor does its value depend ?

Explanation

Electromotive force (emf) of a cell may be defined as the potential difference between the terminals of the cell when no current is drawn from the cell .
The e.m.f of a cell depends upon the following factors :
1. Nature and electrodes .
2. Nature and concentration of electrolyte.
3. Temperature of electolyte used in cell .