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RAJASTHAN ­ PET Rajasthan PET Solved Paper-2003

  • question_answer
    In LC-R circuit,\[R=300\Omega ,\text{ }L=0.9\text{ }H,\text{ }C=\]\[2\mu F\]and \[\omega =1000\]rad/s, the impedance of circuit is

    A)  1300\[\Omega \]             

    B)  900\[\Omega \]

    C)  500\[\Omega \]         

    D)  400\[\Omega \]

    Correct Answer: C

    Solution :

     The impedance of circuit \[Z=\sqrt{{{R}^{2}}+{{({{X}_{L}}-{{X}_{C}})}^{2}}}\] \[=\sqrt{{{(300)}^{2}}+{{\left( 1000\times 0.9-\frac{1.6}{1000\times 2} \right)}^{2}}}\] \[=500\,\Omega \]


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