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Uttarakhand PMT Uttarakhand PMT Solved Paper-2008

  • question_answer
    A voltmeter of range 2V and resistance 300\[\Omega \] cannot be converted into ammeter of range

    A)  1A           

    B)  1mA

    C)  100mA       

    D)  10mA

    Correct Answer: B

    Solution :

     \[{{i}_{g}}=\frac{2}{300}A\] \[=\frac{2}{300}\times 1000\,mA\] \[=\frac{20}{3}mA\] \[{{i}_{g}}=6.67\text{ }mA\] As range of ammeter cannot be decreased but can be increased only, therefore, the instrument cannot be converted to measure the range 1 mA.


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