In a given circuit, equivalent resistance between A and B = `Omega`.

Options

A. r
B. `(4r)/(3)`
C. 4r
D. `(r)/(4)`

Answer

D

Explanation

`(r)/(4)`
Drawing equivalent circuit

`therefore (I)/(R) = (I)/(r) + (I)/(R) + (I)/(R)+ (I)/(R) = (4)/(r)`
`therefore R = (r)/(4) Omega`