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  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2013

  • question_answer
    Two 220 V, 100 W bulbs are connected first in series and then in parallel. Each time the combination is connected to a 220V AC supply line, the power drawn by the combination in each case respectively will be

    A)  50 W, 200 W      

    B)  50 W, 20 W

    C)  100 W, 50 W       

    D)  200 W, 150 W

    Correct Answer: A

    Solution :

    In series, power, \[P=\frac{{{V}^{2}}}{2R}=\frac{P}{2}=50\,W\] In parallel, power, \[P=\frac{{{V}^{2}}}{{}^{R}/{}_{2}}=2P=20\,\,W\]


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