question_answer

In the network shown in figure, each resistance is 10. The effective resistance between A and B is:

A)  \[(4/3)\,\Omega \]                   

B)  \[(3/2)\,\Omega \]

C)  \[7\,\Omega \]                                

D)  \[(8/7)\,\Omega \]

Correct Answer: D

Solution :

Equivalent resistance, \[\operatorname{Re}=\frac{\frac{8}{3}\times 2}{\frac{8}{3}+2}\] \[=\frac{8}{7}\Omega \] (from the circuit shown below, finally)