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

• A. 24 ohm
• B. 16 ohm
• C. $\frac{4}{3}ohm$
• D. $\frac{8}{3}ohm$

Answer 1

Answer: (D)

$\frac{8}{3}ohm$

Answer 2

Effective resistance between the points A and B is $R = \frac{32}{12} = \frac{8}{3}\Omega$