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  • To get the maximum current through a resistance of 2.5 , one can use rows of cells, each row having n cells.

To get the maximum current through a resistance of 2.5 \Omega, one can use rows of cells, each row having n cells. The internal resistance of each cell is 0.5\Omega. What are the valued of n and m, if the total number of cells is 45?

Option: 1

3,15


Option: 2

5,9


Option: 3

9,5


Option: 4

15,3


Answers (1)

best_answer

For maximum current, net resistance of cells must be equal to 2.5 \Omega

i.e., \mathrm{\frac{n(0.5)}{m}=25 \quad \quad \quad (i)}

and \mathrm{ m \times n=45 \quad \quad \quad (ii)}

solving, we get \mathrm{ n=15, m=3}

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Pankaj

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