JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors Question Bank Heating Effect of Current

  • question_answer The heating coils rating at 220 volt and producing 50 cal/sec heat are available with the resistances \[55\,\Omega ,\ 110\,\Omega ,\ 220\,\Omega \]  and \[440\,\Omega \]. The heater of maximum power will be of  [MP PMT 1985]

    A)            \[440\,\Omega \]               

    B)            \[220\,\Omega \]

    C)            \[110\,\Omega \]               

    D)            \[55\,\Omega \]

    Correct Answer: D

    Solution :

               \[\frac{H}{t}=\frac{{{V}^{2}}}{R}\]Þ \[\frac{H}{t}\propto \frac{1}{R}\]

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