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Manipal Medical Manipal Medical Solved Paper-2013

  • question_answer
    The current and voltage in AC circuit are given by \[I=5\sin \left( 100t-\frac{\pi }{2} \right)A\]and \[V=200\sin (100t)\]volt. The power dissipated in the circuit will be

    A)  20 W   

    B)  40 W    

    C)  1000 W

    D)  zero

    Correct Answer: D

    Solution :

     \[P={{E}_{rms}}\times {{i}_{rms}}\times \cos \phi \] \[\phi =\frac{\pi }{2}\] \[\cos \phi =0\] \[P={{E}_{rms}}\times {{i}_{rms}}\times (0)=0\]


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