In the given circuit, calculate the effective resistance between A and B.

Explanation

Equivalent circuit may be written as
`1/(R_(AB))=1/(R_(1))+1/(R_(2))+1/(R_(3))+1/(R_(4))`
`1/(R_(AB))=1/3+1/18+1/12+1/2=(12+2+3+18)/36`
i.e., `R_(AB)=36/35=1.025Omega`
i.e., `R_(AB)=1.02Omega`