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JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Kirchhoffs Law Cells

  • question_answer
    Two batteries, one of emf 18 volts and internal resistance \[2\Omega \] and the other of emf 12 volt and internal resistance \[1\Omega \], are connected as shown. The voltmeter \[V\]will record a reading of                                   [CBSE PMT 2005]

    A)                     15 volt

    B)                     30 volt

    C)                     14 volt

    D)                     18 volt

    Correct Answer: C

    Solution :

                Reading of voltmeter \[={{E}_{eq}}=\frac{{{E}_{1}}{{r}_{2}}+{{E}_{2}}{{r}_{1}}}{{{r}_{1}}+{{r}_{2}}}=\frac{18\times 1+12\times 2}{1+2}=14V\]


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