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JIPMER Jipmer Medical Solved Paper-2002

  • question_answer
    It takes two seconds to heat water to boiling point using a 10 m length heater coil. What time will it take for the same using 5 m of heater coil connected to the same source:

    A)  2 s                                         

    B)  3 s                         

    C)                         1 s                         

    D)                                         10.5 s

    Correct Answer: C

    Solution :

    According to the question, if the length of the heater coil is reduced half, then the resistance also becomes half of the value \[\frac{{{E}^{2}}}{R}{{t}_{1}}=\frac{{{E}^{2}}}{R\text{/}2}{{t}_{2}},\]                         here\[{{t}_{1}}=2\,\,\sec \] therefore            \[{{t}_{2}}=1\,\,\sec \]


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