CMC Medical CMC-Medical Ludhiana Solved Paper-2012

  • question_answer
    If three resistors each of 40, are connected together to form a network, then the equivalent resistance of the network cannot be

    A)  \[3\,\Omega \]                               

    B)  \[6\,\Omega \]

    C)  \[12\,\Omega \]                             

    D)  \[1.33\,\,\Omega \]

    Correct Answer: A

    Solution :

                    If all of them are connected in series, the\[{{R}_{eq}}=12\,\Omega \] If all are in parallel then\[{{R}_{eq}}=\frac{4}{3}\,\Omega =1.33\,\Omega \] If iwo are in series then parallel with third, \[{{R}_{eq}}=\frac{8}{3}=2.6\,\,\Omega \] If twoare in parallel then series with third, \[{{R}_{eq}}=6\,\Omega \]


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