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

  • question_answer An electric fan and a heater are marked as 100 watt, 220 volt and 1000 watt, 220 volt respectively. The resistance of the heater is                                                                    [CPMT 1990]

    A)            Zero

    B)            Greater than that of the fan

    C)            Less than that of the fan

    D)            Equal to that of the fan

    Correct Answer: C

    Solution :

                       For constant voltage, we know that \[P\propto \frac{1}{R}\]            So higher the power, lower will be the resistance.

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