Question

Find out equivalent resistance between a and b.

Answer 1

Arranging the circuit:

This circuit follows a Wheatstone bridge so arm cd does not work.

Adding resistances of path acb in series
R₂ = R + R = 2R
Adding resistances of path adb in series
R₂ = R + R = 2R
Adding R₁ and R₂ in parallel
\(R^{\prime}=\frac{R_{1} \times R_{2}}{R_{1}+R_{2}}=\frac{2 R \times 2 R}{4 R}=R \Omega\)