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JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा JEE PYQ-Alternating Current

  • question_answer
    In a series LCR circuit\[R=200\,\,\Omega \]and the voltage and the frequency of the main supply is 220 V and 50 Hz respectively. On taking out the capacitance from the circuit the current lags behind the voltage by\[30{}^\circ \]. On taking out the inductor from the circuit the current leads the voltage by 30°. The power dissipated in the LCR circuit is -                       [AIEEE 2010]

    A) 242 W

    B) 305 W

    C) 210 W

    D) Zero W

    Correct Answer: A

    Solution :

    [a] \[{{X}_{L}}={{X}_{C}}\] \[P=\frac{{{V}^{2}}}{R}=242W\]


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