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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2002

  • question_answer
    40 W, 100 W and 200 W bulbs are connected with a source of 200 V. Rating of all bulbs arc also 200 V, Now, they are connected in series, then which bulbs will glow more:

    A)  300W                                   

    B)  100W

    C)  40 W                    

    D)         all gives same light

    Correct Answer: C

    Solution :

    Resistance\[R=\frac{{{V}^{2}}}{P}\] \[R=\propto \frac{1}{P}\] So, the resistance of 40 watt is maximum, heat produced\[H\propto R\] \[\therefore \]heat produced in 40 watt bulb will be maximum, so it will glow more.


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