difference between terminal voltage and e m f - Physics - Electric circuits Resistance and Ohm\s law

Question

difference between terminal voltage and e m f

Somnath physics · Accepted Answer

Terminal
voltage is the potential difference across the terminals of a load
when the circuit is switched on

E m f is the
maximum potential difference that can be delivered by a cell or a
generator when no current flows through it

Terminal
voltage is measured by voltmeter

E m f is
measured by potentiometer

Terminal
voltage is always lesser than the emf of the cell It is because of
the drop in potential because of the current passing through the
internal resistance of the cell or the generator Emf (E) and
terminal (V) is related by the following equation

E = V + Ir
Where I = current and r = internal resistance of the
cell

difference between terminal voltage and e.m.f