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 moving coil galvanometer of resistance 100W is used as an ammeter using a resistance 0.1W.  The maximum deflection current in the galvanometer is 100mA. Find the minimum current in the circuit so that the ammeter shows maximum deflection                                 [IIT-JEE (Screening) 2005]

    A)            100.1 mA                               

    B)            1000.1 mA

    C)         10.01 mA                        

    D)         1.01 mA

    Correct Answer: A

    Solution :

                 \[{{I}_{G}}\times G=\left( I-{{I}_{G}} \right)\,S\]Þ I = \[\left( 1+\frac{G}{S} \right){{I}_{G}}\] Þ I = 100.1 mA


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