Question

Calculate the highest resistance and the lowest resistance that can be obtained using 4,8

Answer 1

Ans: Given resistances R1 =4 Ω, R2=8 Ω, R3=12Ω, and R4=24Ω. 
(a) If these coils are connected in series, then the equivalent resistance will 
be the highest, as R=R1+R2+R3+R4 
∴ R=4+8+12+24 = 24Ω
(b) If these coils are connected in parallel, then the equivalent resistance will be the lowest, given by



⇒R=2 Ω 
∴ 2 Ω is the lowest total resistance