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Which one of the following is the value of 1 KWh of energy converted into joules? 

  1. 1.8 × 106 J
  2. 3.6 × 106 J
  3. 6.0 × 106 J
  4. 7.2 × 106 J

Answer (Detailed Solution Below)

Option 2 : 3.6 × 106 J
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Detailed Solution

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Concept:

Joule is a SI unit of energy or work done which is represented by J

Watt is a S.I unit of Power and it is represented as W

Work done (J) = power (W) × time (sec)

1 joule = 1 watt. Sec

Calculation:

Since 1 KW = 1000 W

And 1 hour = 60 min x 60 sec

 Thus 

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