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

  • question_answer
    In a series LCR circuit, resistance \[R=10\Omega \] and the impedance \[Z=20\Omega .\] The phase difference between the current and the voltage is [KCET (Engg./Med.) 1999]

    A)            \[{{30}^{o}}\]                       

    B)            \[{{45}^{o}}\]

    C)            \[{{60}^{o}}\]                       

    D)            \[{{90}^{o}}\]

    Correct Answer: B

    Solution :

               \[\cos \varphi =\frac{R}{Z}=\frac{10}{20}=\frac{1}{2}\,\Rightarrow \,\varphi ={{60}^{o}}\]


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