Question

The plot of the variation of potential difference across a combination of three identical cells in series, versus current is as shown in the figure. What is the emf of each cell? (Delhi 2008)​

Answer 1

Answer:

Solution : Total emf of three cells in series (`3 epsilon`) <br> = pot. Diff. corresponding to zero current <br> `:. 3 epsilon = 6 V or epsilon = 6/3 = 2V` <br> The internal resistance of each cell <br> `r= epsilon/I_(max) = 2/1 = 2 Omega

Explanation:

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