Question

To get maximum current through a resistance of 2.5
one can use 'm' rows of cells, each row having 'n' cells.
The internal resistance of each cell is 0.5 . What are
the values of n & m, if the total no. of cells is 45?
(1) 3, 15
(2) 5,9
(3) 9,5
(4) 15,3​

Answer 1

Explanation:

Multiplying on the number line works no matter what number you count off by. For example, the number line in the following figure counts off by 5s. This time, the only numbers marked are the multiples of 5, so you can use this number line to multiply any number by 5. For example, the following figure shows how to multiply 2 5.