Question 7
What is the minimum resistance which can be made using five resistors each of 15Ω?
(a) 15Ω
(b) 125Ω
(c) 110Ω
(d) 25Ω
(b) 125Ω
Minimum resistance will be achieved when all the resistors are connected in parallel.
1Rmin=(115+115+115+115+115)
⇒ 1Rmin=5+5+5+5+5=25
⇒ Rmin=125Ω