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

  • question_answer Two bulbs X and Y having same voltage rating and of power 40 watt and 60 watt respectively are connected in series across a potential difference of 300 volt, then [Orissa JEE 2005]

    A)            X will glow brighter

    B)            Resistance of Y is greater than X

    C)            Heat produced in Y will be greater than X

    D)            Voltage drop in X will be greater than Y

    Correct Answer: A

    Solution :

               Resistance\[\propto \frac{1}{\text{power}}\]. Thus, 40 W bulb has a high resistance. Because of which there will be more potential drop across 40 W bulb. Thus 40 W bulb will glow brighter.

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