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

  • question_answer Two wires with resistances R and 2R are connected in parallel, the ratio of heat generated in 2R and R is [DCE 1999, 2000]

    A)            1 : 2                                          

    B)            2 : 1

    C)            1 : 4                                          

    D)            4 : 1

    Correct Answer: A

    Solution :

               \[H=\frac{{{V}^{2}}}{R}.\,t\] Þ \[\frac{{{H}_{1}}}{{{H}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}=\frac{R}{2R}=\frac{1}{2}\]

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