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NEET NEET SOLVED PAPER 2016 Phase-II

  • question_answer
    A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500 W. The value of R is

    A)  \[230\Omega \]             

    B)  \[46\Omega \]

    C)  \[26\Omega \]               

    D)  \[13\Omega \]

    Correct Answer: C

    Solution :

                \[I=\frac{P}{V}=\frac{500}{100}=5A\]             Voltage across resistance R will be             230-100=130 v             \[R=\frac{130}{5}=26\Omega \]


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