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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2001

  • question_answer
    A milliammeter of range 10 mA has a coil of resistance \[1\Omega .\] To use it as voltmeter of range 10 volt, the resistance that must be connected in series with it, will be:

    A)  \[999\,\Omega \]                           

    B) \[99\,\Omega \]

    C) \[~1000\text{ }\Omega \]                           

    D)  none of these

    Correct Answer: A

    Solution :

    Given: Range of milliammeter \[{{A}_{ig}}=10\,mA=10\times {{10}^{-3}}\text{amp}\text{.}\] Resistance \[G=1\,\Omega \] Range of voltmeter \[V=10\]volt The relation for the resistance that must be connected is given by \[=\frac{V}{{{i}_{g}}}-G=\left( \frac{10}{10\times {{10}^{-3}}} \right)-1=1000-1=999\,\Omega \]


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