A cell having an emf ε 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 byNEET 20

Question

A cell having an emf ε 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 byNEET 2012 (Mains)

TestHub · Accepted Answer

Here, E = I ( R + r ) ⇒ E = I R + I r and ​ E = V + I r E = V + R + r E r ​ V = E − R + r E ​ × r y = c − x 1 ​ ​ This equation represents option (3).

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