The standard electrode potential E0 at a fixed temperature and in a given medium is dependent on
(1) only the electrode composition
(2) the electrode composition and the extent of the reaction
(3) the extent of the electrode reaction only
(4) the electrode reaction and the electrode composition
The standard electrode potential Eo at a fixed temperature, the standard EMF of a cell depends upon electrode composition i.e., type of electrode and electrode reaction are also depends
Eocell = Eocathode – Eoanode.