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JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Alternating Current, Voltage and Power

  • question_answer
    A bulb is connected first with dc and then ac of same voltage then it will shine brightly with         [RPET 2000]

    A)            AC

    B)            DC

    C)            Brightness will be in ratio 1/1.4

    D)            Equally with both

    Correct Answer: D

    Solution :

               Brightness µ \[{{P}_{consumed}}\propto \frac{1}{R}\] for Bulb, \[{{R}_{ac}}={{R}_{dc}},\] so brightness will be equal in both the cases.


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