question_answer

If each of the resistance of the network shown in figure is R, the equivalent resistance between A and B is:

A)  3 R

B)  5 R

C)  R/2

D)  R

Correct Answer: D

Solution :

 Equivalent circuit in Wheatstone bridge I = 0 in PQ. \[{{\operatorname{R}}_{eq}}=\frac{2R\times 2R}{4R}=R\]