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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2006

  • question_answer
    In an AC circuit, the current is given by \[I=5\,\sin (100t-\text{ }\!\!\pi\!\!\text{ /2)}\] and the alternating potential is V = 200 sin (100)C volt. The power consumed in the circuit is

    A)  20 W                                    

    B)  40 W

    C)  1000 W                               

    D)  zero

    Correct Answer: D

    Solution :

    \[I=5\sin (100t-\pi /2)\] \[V=200\,\sin \,100t\] Phase difference between alternating current and alternating voltage is \[\pi /2\]. \[\therefore \] Power consumption \[(\bar{P})={{V}_{rms}}.{{I}_{rms}}.\cos \frac{\pi }{2}\]\[=0\]


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