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RAJASTHAN ­ PET Rajasthan PET Solved Paper-2003

  • question_answer
    An AC circuit has voltage\[V=5\text{ }sin\text{ }10t,\]if\[R=1\,\Omega \]and\[L=0.1\text{ }H,\]then what is the phase difference between current and voltage?

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

    B)  \[0\]

    C)  \[\frac{\pi }{2}\]             

    D)  \[\infty \]

    Correct Answer: A

    Solution :

     \[\phi ={{\tan }^{-1}}\left( \frac{\omega L}{R} \right)\] \[={{\tan }^{-1}}\left( \frac{10\times 0.1}{1} \right)\] \[={{\tan }^{-1}}(1)=\frac{\pi }{4}\]


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