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Which one of the following is not the unit of heat?
1. calorie
2. kilocalorie
3. kilojoule
4. watt

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Correct Answer - Option 4 : watt

The correct answer is watt.

  • Heat is the form of energy that is transferred between systems or objects at different temperatures.
  • Units of Heat-
    • SI unit of heat is Joule.
    • In the CGS system, the unit of heat is calories.
    • And 1 kcal = 1000 cal.
    • BTU is also a unit of heat and 1 BTU = 1055 Joule.
  • The watt W is a unit of power. It is defined as a derived unit of 1 joule per second and is used to quantify the rate of energy transfer.

  • One calorie is the energy required to raise the temperature of 1g of water by 1-degree celsius.  
  • One BTU is the amount of energy required to raise the temperature of 1 lb of water by 1-degree fareinght. 
  • The erg is the c.g.s. unit of energy and a very small one; the work done when a 1-dyne force acts over a distance of 1 cm.

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