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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 number of dry cells, each of e.m.f. 1.5 volt and internal resistance 0.5 ohm that must be joined in series with a resistance of 20 ohm so as to send a current of 0.6 ampere through the circuit is                                                [SCRA 1998]

    A)                    2

    B)                                      8

    C)                    10                                      

    D)            12

    Correct Answer: C

    Solution :

               In series \[i=\frac{nE}{nr+R}\] Þ \[0.6=\frac{n\times 1.5}{n\times 0.5\times 20}\]Þ n = 10


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