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

  • question_answer What is the ratio of heat generated in R and 2R  [DCE 2003]

    A)            2 : 1

    B)            1 : 2

    C)            4 : 1

    D)            1 : 4

    Correct Answer: A

    Solution :

                       Both R and 2R in parallel ( V ? constant) So using \[P=\frac{{{V}^{2}}}{R}\] Þ \[\frac{{{P}_{1}}}{{{P}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}\] Þ \[\frac{{{H}_{1}}}{{{H}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}=\frac{2}{1}\]

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