Distinguish between emf © and terminal voltage (V) of a cell having internal resistance r. Draw a plot showing the variation of terminal voltage (V) vs the current (I) drawn from the cell. Using this plot, how does one determine the internal resistance of the cell ?
Difference between emf (e) and terminal voltage (V)
emf:1.It is the potential difference between two terminals of the cells when no current is drawn from it.
2.It is a cause.
Terminal voltage:1.It is the potential difference between two terminals when current passes through it.
2.It is an effect.
