Archive
24th of March 2017
Physics
Q:

Explain and differentiate between e.m.f. of a cell and terminal voltage of a cell .

Abhishek Kumar - ICSE - Class X

Friday, March 24, 2017 at 15:40:PM

A:

Hi Abhishek,

When no current is drawn from a cell i.e., when the cell is in open circuit, the potential difference between the terminals of the cell is called its electro-motive force (or e.m.f.).

When current is drawn from a cell, i.e., when the cell is in a closed circuit, the potential difference between the electrodes of the cell is called its terminal voltage.

Hence, we can say that emf is greater than or equal to terminal voltage.

Friday, March 24, 2017 at 18:20:PM