question_answer

Seven resistances are connected as shown in the figure.  The equivalent resistance between A and B is [MP PET 2000]

A)            3 W

B)            4 W

C)            4.5 W

D)            5 W

Correct Answer: B

Solution :

                   The given circuit can be simplified as follows Now it is a balance Wheatstone bridge. So, Þ \[{{R}_{AB}}=\frac{8\times 8}{8+8}=\frac{64}{16}=4\Omega \]