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

  • question_answer
    An ammeter reads upto 1 ampere.  Its internal resistance is 0.81 ohm.  To increase the range to 10 A the value of the required shunt is                                                            [AIEEE 2003]

    A)         0.09 W

    B)                        0.03 W

    C)         0.3 W                               

    D)         0.9 W

    Correct Answer: A

    Solution :

                                             \[\frac{i}{{{i}_{g}}}=1+\frac{G}{S}\]Þ \[\frac{10}{1}=1+\frac{0.81}{S}\]\[\Rightarrow S=0.09\Omega \].


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