`2A` cell having an emf `epsilon` 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 byA. B. C. D.

`2A` cell having an emf `epsilon` and internal resistance `r` is conne

1.	`2A` cell having an emf `epsilon` 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 byA. B. C. D.
Answer» Correct Answer - C (c ) Here, `E = I (R + r) implies E = IR + Ir` and `E = V + Ir` `E = V + (Er)/(R + r)` `V = E - (E)/(R + r) xx r = E [1 - (1)/(1 + R//r)]` This equaiton represents option `(c )`.

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`2A` cell having an emf `epsilon` 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 byA. B. C. D.

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