Question

please solve this question.

Answer 1

Answer is 1:100
firstly for obtaining minimum resistance they should be connected in parallel arrangement
then the resistance will be 10(1/2) = 5 = 1/R
R = 1/5 ohm
then for obtaining maximum resistance they will be connected in series arrangement
then the resistance will be 10(2) = 20
R' = 20
ratio of R : R' = 0.2 : 20
= 1 : 100