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NEET Sample Paper NEET Sample Test Paper-85

  • question_answer
    A heater of 220 V heats a volume of water in 5 minutes. A heater of 110 V heats the same volume of water in

    A) 5 minutes

    B)                    8 minutes

    C) 10 minutes        

    D)        20 minutes

    Correct Answer: D

    Solution :

    [d] Heat produced,\[H=\frac{{{V}^{2}}t}{R}.\] When voltage is halved, the heat produced becomes one fourth. Hence time taken to heat the water becomes four times.


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