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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2008

  • question_answer
        In a LCR series circuit, the potential difference between the terminals of the inductance is 60 V between the terminals of the capacitor is 30V and that across the resistance is 40 V Then, supply voltage will be equal to

    A)  50 V                                     

    B)  70 V

    C)  130 V                                     

    D)  10 V

    Correct Answer: A

    Solution :

                    In LCR series circuit, \[V=\sqrt{V_{R}^{2}+{{({{V}_{L}}-{{V}_{C}})}^{2}}}\] \[=\sqrt{{{(40)}^{2}}+{{(60-30)}^{2}}}\] \[=\sqrt{1600+900}=\sqrt{2500}\] \[=50\,V\]          


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