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  • To get maximum current through a resistance of 2.5 one can use ' <img alt="m" src="https://learn.careers360.co

To get maximum current through a resistance of 2.5 \Omega one can use ' m ' rows of cells, each row having ' n ' cells. The internal resistance of each cell is 0.5 \Omega. What are the values of n &  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

 

Equivalent internal resistance is given by -r_{eq}= \frac{nr}{m}

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

i.e. \frac{n\left ( 0.5 \right )}{m}= 2.5.....................(1)

And \, \, m\times n= 45..........................(2)

Solving,we get n=15,m=3

 

Posted by

Rishi

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