Manipal Medical Manipal Medical Solved Paper-2012

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

    A)  1 A             

    B)  1 mA

    C)  100 mA         

    D)  10 mA

    Correct Answer: B

    Solution :

     \[{{I}_{g}}=\frac{2}{300}A\] \[=\frac{2}{300}\times 1000\,mA\] \[=\frac{20}{3}mA\] \[{{I}_{g}}=6.67\,mA\] 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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