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  • The plot of the variation of potential difference across a combination of three identical cells in series, versus current is shown below. What is the emf and internal resistance of each cell? <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEU

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

 

 

 

 
 
 
 
 

Answers (1)

when current = 0
E = V
\therefore Total emf = 6 V
when, current = 1 A , Voltage = 0
\Rightarrow r_{eq}= \frac{6}{1}= 6\Omega
Each cell has an emf of 2V and internal resistance of 2 \Omega

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