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Four wires AB, BC, CD, DA of resistance ...

Four wires AB, BC, CD, DA of resistance 4 ohm each and fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is diagonal. The effective resistance between the points A and B is

A

24 ohm

B

16 ohm

C

`4/3` ohm

D

`8/3` ohm.

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