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10th Class Science Electricity and Circuits Question Bank Electricity

  • question_answer
    A 200 W and a 100 W bulbs, both meant for operation at 220 V, are connected in series, to a 220 V supply. The power consumed by them will be

    A)  33 W         

    B)  66 W  

    C)  100 W

    D)  300 W

    Correct Answer: B

    Solution :

     In such questions, calculate\[x\], where\[x=\frac{{{P}_{big}}}{{{P}_{small}}}\] Now,     \[{{P}_{combined}}=\left( \frac{x}{x+1} \right)\times {{P}_{small}}\] \[=\frac{2}{3}\times 100=66.6\]


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