question_answer

Five resistors are connected as shown in the diagram. The equivalent resistance between \[A\] and \[B\] is

A)                    \[6\,ohm\]

B)                    \[9\,ohm\]

C)                    \[12\,ohm\]

D)                    \[15\,ohm\]

Correct Answer: A

Solution :

             Since the given bridge is balanced, hence there will be no current through \[9\Omega \] resistance. This resistance has no effect and must be ignored in the calculations. \[{{R}_{AB}}=\frac{9\times 18}{27}=6\,\Omega \]