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 galvanometer has a resistance of 25 ohm and a maximum of 0.01 A current can be passed through it.  In order to change it into an ammeter of range 10 A, the shunt resistance required is                                             [MP PET 2000]

    A)         5/999 ohm

    B)                        10/999 ohm

    C)         20/999 ohm                  

    D)         25/999 ohm

    Correct Answer: D

    Solution :

                                             \[{{i}_{g}}=i\frac{S}{G+S}\]  Þ  \[0.01=10\frac{S}{25+S}\] \[\Rightarrow \,\,\,1000S=25+S\] Þ  \[S=\frac{25}{999}\Omega \].


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