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Punjab Medical Punjab - MET Solved Paper-2010

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

    A) \[10000\Omega \]                          

    B) \[9000\Omega \]

    C) \[222\Omega \]                               

    D) \[111\Omega \]

    Correct Answer: D

    Solution :

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


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