Question

To get maximum current in a resistance of 3 Ω one can use n rows of m cells connected in parallel. If the total no. of cells is 24 and the internal resistance of a cell is 0.5 then

(a)  m = 12, n = 2

(b)  m = 8, n = 4

(c)  m = 2, n = 12

(d)  m = 6, n = 4

Answer 1

Correct option  (a) m = 12, n = 2

Explanation:

In this question R = 3Ω, mn = 24, r = 0.5Ω and  R = mr/n.

On putting the values we get n = 2 and m = 12.