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JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Different Measuring Instruments

  • question_answer
    A potentiometer has uniform potential gradient across it.  Two cells connected in series (i) to support each other and (ii) to oppose each other are balanced over 6m and 2m respectively on the potentiometer wire.  The e.m.f.?s of the cells are in the ratio of                                            [MP PMT 2002]

    A)         1 : 2                                  

    B)         1 : 1

    C)         3 : 1                                  

    D)         2 : 1

    Correct Answer: D

    Solution :

                                             \[\frac{{{E}_{1}}}{{{E}_{2}}}=\frac{{{l}_{1}}+{{l}_{2}}}{{{l}_{1}}-{{l}_{2}}}=\frac{(6+2)}{(6-2)}=\frac{2}{1}\]


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