Question

What is the minimum resistance which can be made using five resistors each of 1/5 Ω?

Options

• 1/5 Ω

• 1/25 Ω

• 1/10 Ω

• 25 Ω

Answer 1

1/25 Ω

Explanation - 

Resistance will be minimum when all the five resistors are in parallel connection. Since all the five resistors are identical so the formula will be 

`"R"_"min" = "R"/5`

`"R"_"min" = ((1//5))/5`

`"R"_"min" = 1/25 `Ω