Question

find the effective resistance between A and B
(a)54 ohms
(b)18 ohms
(c)9 ohms
(d)15 ohms

Answer 1

I think maybe (c). 9 ohms because starting from A if we see the resistances the branch that divides from A has a parralel connection with each other then the same pattern is followed thrice so when we consider the upper branch the resistance is 3+3=6and then both upper and lower branch is parralel ie 1/r=(1/6)+(1/6)
r=3
then same thing thrice so total r =3+3+3=9