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

  • question_answer A \[4\mu F\] conductor is charged to 400 volts and then its plates are joined through a resistance of \[1\,k\Omega \]. The heat produced in the resistance is                                                                   [CBSE PMT 1994]

    A)            0.16 J                                       

    B)            1.28 J

    C)            0.64 J                                       

    D)            0.32 J

    Correct Answer: D

    Solution :

                       Heat produced = Energy stored in capacitor            \[=\frac{1}{2}C{{V}^{2}}\]\[=\frac{1}{2}\times 4\times {{10}^{-6}}\times {{(400)}^{2}}\]\[=0.32\,\,J\]


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