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

  • question_answer If 2.2kW power is transmitted through a \[100\Omega \] line at \[22,000V,\] the power loss in the form of heat will be [MP PET 2004]

    A)            0.1 W                                        

    B)            1 W

    C)            10 W                                         

    D)            100 W

    Correct Answer: B

    Solution :

                       \[P=Vi\] Þ \[i=\frac{2.2\times {{10}^{3}}}{22000}=\frac{1}{10}A\] Now loss of power \[={{i}^{2}}R\]\[={{\left( \frac{1}{10} \right)}^{2}}\times 100\] = 1 W

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