Question

) Four wires AB, BC, CD, DA of resistance 4 ohm each and a fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is a diagonal. The effective resistance between the points A and B is [MP PMT 1994]
A) 24 ohm B) 16 ohm C) \frac{4}{3}ohm D) \frac{8}{3}ohm

Answer 1

(D) is the answer,I think.
Because AB and BD are in series and CD and BC are in series.And then now all three are in parallel connection.So it should be 8/3 ohm