What is the minimum resistance which can be made using five resistors each of `(1//5) Omega` ?

Options

A. `1/5 omega`
B. `1/25 omega`
C. `1/10 omega`
D. `25 omega`

Answer

B

Explanation

Minimum resistance in obtained when resistors are connected in parallel combination.
Thus, equivalent resistance obtained by connecting five resistors of resistance `1/5 omega` each, parallel to each other :
`1/R=1/(1//5)+1/(1//5)+1/(1//5)+1/(1//5)+1/(1//5)implies 5/(1//5)`
`1/R=25/1`
`implies R=1/25 omega`