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

  • question_answer
    A 12 ohm resistor and a 0.21 henry inductor are connected in series to an ac source operating at 20 volts, 50 cycle/second. The phase angle between the current and the source voltage is                                   [BHU 1994]

    A)            30°

    B)            40°

    C)            80°

    D)            90°

    Correct Answer: C

    Solution :

               \[\tan \varphi =\frac{\omega L}{R}=\frac{2\pi \times 50\times 0.21}{12}=5.5\,\Rightarrow \,\varphi ={{80}^{o}}\]


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