A cell of emf `E` and internal resistance r is connected across an external resistance `R`. Plot a graph showing the variation o `P.D`. Across `R`, verses 'R`.

.A cell of emf E and internal resistance r is connected across a variable resistor. Plot a graph showing variation of terminal voltage V of cell versus the current.

A cell of emf epsilon and internal resistance r is connected across a variable resistor R. Plot a graph showing variation of terminal voltage V of the cell versus the current I. Using the plot, show how the emf of the cell and its internal resistance can be determined.

A cell of e.m.f (E) and internal resistance (r) is connected in series with an external resistance (nr.) then the ratio of the terminal p.d. to E.M.F is

A cell of emf E and internal resistance r is connected in series with an external resistance nr. Than what will be the ratio of the terminal potential difference to emf, if n=9.

A cell having an emf E and internal resistance r is connected across a variable external resistance R. As the resistance R is increased, the plot of potential difference V across R is given by