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

  • question_answer
    A 50V battery is connected across a 10 ohm resistor. The current is 4.5 amperes. The internal resistance of the battery is                                                 [CPMT 1985; BHU 1997; Pb. PMT 2001]

    A)                    Zero

    B)                                      0.5 ohm

    C)                    1.1 ohm

    D)            5.0 ohm

    Correct Answer: C

    Solution :

               \[i=\frac{50}{R+r}\] Þ \[r=\frac{50}{4.5}-10=\frac{5}{4.5}=1.1\Omega \]   


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