question_answer

In the network shown in the figure, each of the resistance is equal to \[2\,\Omega \]. The resistance between the points A and B is [CBSE PMT 1995]

A)                    \[1\,\Omega \]

B)                    \[4\,\Omega \]

C)                    \[3\,\Omega \]

D)                    \[2\,\Omega \]

Correct Answer: D

Solution :

             The equivalent circuits are as shown below Clearly, the circuit is a balanced Wheatstone bridge. So effective resistance between A and B is \[2\,\Omega \].