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

  • question_answer How much energy in kilowatt hour is consumed in operating ten 50 watt bulbs for 10 hours per day in a month (30 days).       [NCERT 1978, 80; CPMT 1991]

    A)            1500                                         

    B)            5,000

    C)            15  

    D)            150

    Correct Answer: D

    Solution :

                       Energy consumed in \[kWh=\frac{Watt\times hour}{1000}\]            Þ For 30 days, \[P=\frac{10\times 50\times 10}{1000}\times 30=150kWh\]

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