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

  • question_answer
    In an ac circuit, a resistance of R ohm is connected in series with an inductance L. If phase angle between voltage and current be 45°, the value of inductive reactance will be  [MP PMT/PET 1998]

    A)            \[\frac{R}{4}\]                     

    B)            \[\frac{R}{2}\]

    C)            R

    D)            Cannot be found with the given data

    Correct Answer: C

    Solution :

               \[\tan \varphi =\frac{{{X}_{L}}}{R}\,\Rightarrow \,\tan {{45}^{o}}=\frac{{{X}_{L}}}{R}=1\,\Rightarrow \,{{X}_{L}}=R\]


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