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  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2014

  • question_answer
    An electric bulb is made of tungsten filament of resistance \[R\,\,\Omega \]. It is marked 100W and 230 V. Then, the value of R is

    A)  \[300\,\,\Omega \]

    B)  \[529\,\,\Omega \]   

    C)  \[739\,\,\Omega \]   

    D)  \[100\,\,\Omega \]

    Correct Answer: B

    Solution :

    Power \[P={{V}_{i}}=\frac{{{V}^{2}}}{R}\] \[R=\frac{{{V}^{2}}}{P}=\frac{{{(230)}^{2}}}{100}=529\,\,\Omega \]  


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