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

  • question_answer The energy consumed in 1 kilowatt electric heater in 30 seconds will be

    A)            \[6\times {{10}^{2}}\,J\] 

    B)            \[4.99\times {{10}^{7}}\,J\]

    C)            \[9.8\times {{10}^{6}}\,J\]     

    D)            \[3\times {{10}^{4}}\,J\]

    Correct Answer: D

    Solution :

               E = P × t \[=1000\,W\times 30\,\,sec=3\times {{10}^{4}}\,J\]

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