Question-Answer_Power System

• 1 watt-hour = 1 watt × 1 hr= 1 watt × 3600 sec = 3600 watt-sec
  1 kilowatt hour (kWh) = 1 kW × 1 hr = 1000 watt × 3600 sec= 36 x 10⁵ watt-sec.or Joules 
  1 calorie = 4·18 Joules, 
  
  
  1 kWh = 860 kcal

• The basic unit of energy is Joule
  
  
  
  
  
  

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