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JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा Question Bank ac Circuits

  • question_answer
    An alternating current source of frequency 100 Hz is joined to a combination of a resistance, a capacitance and a coil in series. The potential difference across the coil, the resistance and the capacitor is 46, 8 and 40 volt respectively. The electromotive force of alternating current source in volt is [MP PET 1995]

    A)            94  

    B)            14

    C)            10  

    D)            76

    Correct Answer: C

    Solution :

                       \[{{V}_{L}}=46\,volts,\]\[{{V}_{C}}=40\,volts\], \[{{V}_{R}}=8\,volts\]            E.M.F. of source \[V=\sqrt{{{8}^{2}}+{{(46-40)}^{2}}}=10\,volts\]


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