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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
    The battery \[E\] has an \[e.m.f.\] of \[2\,volt\]. If the galvanometer \[G\] reads zero, then the value of the resistance \[X\] in ohm is [NCERT 1990; AIEEE 2005]

    A)                    10

    B)                    100

    C)                    500

    D)                    200

    Correct Answer: B

    Solution :

               For no current through galvanometer, we have \[\left( \frac{{{E}_{1}}}{500+X} \right)X=E\] Þ \[\left( \frac{12}{500+X} \right)X=2\] Þ \[X=\text{ }100\Omega \]


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