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JEE Main & Advanced AIEEE Solved Paper-2003

  • question_answer
    A 220 V, 1000 W bulb is connected across a 110 V mains supply. The power consumed will be     AIEEE  Solved  Paper-2003

    A) 750 W                   

    B)       500 W                   

    C) 250 W           

    D) 1000 W

    Correct Answer: C

    Solution :

                                    As resistance \[R=\frac{{{V}^{2}}}{P}=\frac{{{(200)}^{2}}}{1000}\] where, V and P are denoting rated voltage and power, respectively. \[\therefore \]      \[{{P}_{consumed}}=\frac{{{V}^{2}}_{applied}}{R}\]                     \[=\frac{110\times 110}{220\times 220}\times 1000\]                     = 250 W


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