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

  • question_answer Two bulbs of 100 W and 200 W working at 220 volt are joined in series with 220 volt supply. Total power consumed will be approximately.                                 [Pb. PET 2003; BHU 2005]

    A)            65 watt                                     

    B)            33 watt

    C)            300 watt                                   

    D)            100 watt

    Correct Answer: A

    Solution :

               \[{{P}_{S}}=\frac{{{P}_{1}}{{P}_{2}}}{{{P}_{1}}+{{P}_{2}}}=\frac{100\times 200}{100+200}=\frac{200}{3}\approx 65\,watt\]

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