Question

To get maximum current in a resistance of 3 , one can use n rows of m cells (connected in series) connected in parallel. If the total no. of cells is 24 and the internal resistance is 0.5 ohm then:

• A. m = 12, n = 2
• B. m = 8, n = 3
• C. m = 2, n = 12
• D. m = 6, n = 4

Answer 1

The correct option is A m = 12, n = 2

We know that t get maximum current in a resistance $\frac{m}{n}=\frac{R}{r}=$

Here, $\frac{m}{n}=\frac{3}{0.5}=6$

Option A-

$\frac{m}{n}=6$

Option B-

$\frac{m}{n}=\frac{8}{3}$

Option C-

$\frac{m}{n}=\frac{1}{6}$

Option D-

$\frac{m}{n}=\frac{3}{2}$

Therefore, A is correct option.