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NEET Sample Paper NEET Sample Test Paper-89

  • question_answer
    When the current in an ac circuit is wattless, the phase difference between the applied voltage and circuit current will be

    A) \[45{}^\circ \]                          

    B) \[60{}^\circ \]

    C) \[90{}^\circ \]              

    D)        \[180{}^\circ \]

    Correct Answer: C

    Solution :

    [c] The current in an ac circuit is said to be wattless, if the power loss in the circuit is zero, i.e., \[P=VI\cos \theta =0\] which gives \[\cos \theta =0\]\[\Rightarrow \]\[\theta =90{}^\circ \]


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