EMF of a Cell
An electric cell is a source of energy that maintains a continuous flow of charge in a circuit. It changes chemical energy into electrical energy. It has two electrodes, positive electrode and negative electrode as shown below.
Electric cell has to do some work in maintaining the current through a circuit. The work done by the cell in moving unit positive charge through the whole circuit (including the cell) is called the electromotive force (emf) of the cell.
When R is infinite, then potential difference V between P and N is
Options:
(a) `epsilon`
(b) `2epsilon`
(c) `epsilon/2`
(d) `epsilon/4`