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The plot of the variation of potential d...

The plot of the variation of potential difference across a combination of three identical cells in series, versus current is as shown in figure. What is the emf and internal resistance of each cell?

Text Solution

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From the graph, when, `I=0`, `V=6` volts.
So, emf of each cell `=6//3=2V`
`r=(E)/(I)=(6)/(1)=6Omega`
So, internal resistance of each cell `=2Omega`.
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