question_answer

Thirteen resistances each of resistance R ohm are connected in the circuit as shown in the figure below.  The effective resistance between A and B is                                  [KCET 2003]

A)         2R W

B)         \[\frac{4R}{3}\,\,\Omega \]

C)         \[\frac{2\,R}{3}\,\,\Omega \]

D)         R W

Correct Answer: C

Solution :

                                         Hence \[{{R}_{eq}}=\frac{2R}{3}\].