question_answer

The potential difference between points \[A\] and \[B\] of adjoining figure is                    [CPMT 1991]

A)                    \[\frac{2}{3}V\]

B)                                                        \[\frac{8}{9}V\]

C)                                                                                                                                                                                                \[\frac{4}{3}V\]             

D)                                                \[2\,V\]

Correct Answer: C

Solution :

            The given circuit can be redrawn as follows For identical resistances, potential difference distributes equally among all. Hence potential difference across each resistance is \[\frac{2}{3}V,\] and potential difference between A and B is \[\frac{4}{3}V.\]