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  • 9 identical cells with emf 1V and internal resistance 1 are connected in a row and 6 such rows are conne

9 identical cells with emf 1V and internal resistance 1\Omega are connected in a row and 6 such rows are connected together in parallel connected across an external resistance of 3\Omega. Then potential difference across each cell  is

Option: 1

\frac{1}{3}V


Option: 2

\frac{2}{3}V


Option: 3

1V


Option: 4

\frac{4}{3}V


Answers (1)

best_answer

As we learnt

Potential difference across each cell -

V'=\frac{V}{n}

-

Current through circuit

i=\frac{mnE}{mR+nr}

m=6,n=9,r=1\Omega,R=3\Omega

i=\frac{54*1}{18+9*1}= 2A

The potential difference across the external resistor =iR=6V

P.D. across each cell =\frac{6}{n}=\frac{6}{9}= \frac{2}{3}V

Posted by

sudhir.kumar

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