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 voltmeter of resistance \[1000\,\Omega \] gives full scale deflection when a current of 100 mA flow through it. The shunt resistance required across it to enable it to be used as an ammeter reading 1 A at full scale deflection is    [SCRA 1994]

    A)                    \[10000\,\Omega \]

    B)                                      \[9000\,\Omega \]

    C)                    \[222\,\Omega \]

    D)                                      \[111\,\Omega \]

    Correct Answer: D

    Solution :

                 By using \[\frac{i}{{{i}_{g}}}=1+\frac{G}{S}\]            Þ \[\frac{i}{100\times {{10}^{-3}}}=1+\frac{1000}{S}\] Þ \[S=\frac{1000}{9}=111\,\Omega \]


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