Q.

1 kWH is equal to

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a

36×105J

b

360 J

c

36 kJ

d

36×105J

answer is D.

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Detailed Solution

1 kWh (kilowatt-hour) represents the amount of energy consumed when 1 kilowatt of power is used for 1 hour. To convert this to joules:

  1. Convert kilowatt-hours to watts-seconds (joules):

    1 kWh=1 kW

    • 1 kW=103 watts
    • 1 hour=3600 seconds

    Therefore:

    1 kWh=103 watts×3600 seconds

  2. Perform the multiplication:

    1 kWh=36×105 joules

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