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JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank Self Evaluation Test - Current Electricity

  • question_answer
    The resistance of the four arms P, Q, R and S in a Wheatstone?s bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively. If the galvanometer. If the galvanometer resistance is 50 ohm, the current drawn from the cell will be

    A) 0.2 A   

    B) 0.1 A

    C) 2.0 A   

    D)        1.0 A

    Correct Answer: A

    Solution :

    [a] Given :\[V=7V\,\]and \[r=5Q\] \[{{R}_{eq}}=\frac{40\times 120}{40+120}\Omega \] \[I=\frac{V}{R}=\frac{7}{5+\frac{40\times 120}{40+120}}=0.2A.\]


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