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  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2005

  • question_answer
    A miiliammeter of range 0 - 30 mA has internal resistance of\[20\,\Omega \]. The resistance to be connected in series to convert it into a voltmeter of maximum reading 3V is:

    A)  \[49\,\Omega \]             

    B)         \[80\,\Omega \]

    C)  \[40\,\Omega \]             

    D)         \[30\,\Omega \]

    E)  \[50\,\Omega \]

    Correct Answer: B

    Solution :

    \[R=\frac{V}{{{I}_{g}}}-G\] \[=\frac{3}{30\times {{10}^{-3}}}-20={{10}^{2}}-20\] \[=80\,\Omega \]


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