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

  • question_answer Two electric bulbs whose resistances are in the ratio of 1 : 2 are connected in series. The powers dissipated in them have the ratio                                                                [NCERT 1977]

    A)            1 : 2                                          

    B)            2 : 1

    C)            1 : 1                                          

    D)            1 : 4

    Correct Answer: A

    Solution :

               In series, current is same in both the bulbs, hence \[P\propto R\,(P={{i}^{2}}R)\]  \[\therefore \frac{{{P}_{1}}}{{{P}_{2}}}=\frac{{{R}_{1}}}{{{R}_{2}}}=\frac{1}{2}\]

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