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

  • question_answer \[A\,\,{{5}^{o}}C\] rise in the temperature is observed in a conductor by passing some current. When the current is doubled, then rise in temperature will be equal to [BHU 2004]

    A)            \[{{5}^{o}}C\]                      

    B)            \[{{10}^{o}}C\]

    C)            \[{{20}^{o}}C\]                    

    D)            \[{{40}^{o}}C\]

    Correct Answer: C

    Solution :

                       Using conservation of energy Supplied electric energy = absorbed heat energy Þ \[{{i}^{2}}Rt=mST\] Þ \[T\propto {{i}^{2}}\]              (T - change in temperature) i.e. when i is doubled T will be four times i.e. \[5\times 4={{20}^{o}}C\]

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