Question

what is the minimum resistance which can be made using five resistors each of 8 ohm​

Answer 1

Answer:

For minimum resistance the all resistors must be in parallel

therefore,

effective minimum resistance will be

$\frac{1}{8} + \frac{1}{8} + \frac{1}{8} + \frac{1}{8} + \frac{1}{8} = \frac{1}{r}$

which will give

$\frac{8}{5}ohm = r$

or 1.6 ohm

Answer 2

For obtaining the minimum resistance from the five resistors , we must connect all of them in parallel

the resistance = R/n = 8/5 = 1.6