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  3. CET Karnataka Engineering

CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2006

  • 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 30 V 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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