In case of heating effect, if 1 calorie of heat energy is converted into joules, then its value will be _________.

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SSC JE Electrical 10 Oct 2023 Shift 2 Official Paper-I
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  1. 2.563 joules
  2. 3.743 joules
  3. 1.853 joules
  4. 4.186 joules

Answer (Detailed Solution Below)

Option 4 : 4.186 joules
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The correct option is 4

Concept:

  •  S.I. unit of heat energy = Joule
  • 1 calorie is originally defined as 1/860 watt-hour. It is equal to 4.1868 joules and is used in engineering steam tables.
  • 1 Calorie = 4.186 Joule
  • 1 Watt = 1 Joule/sec
  • 1 kWh = 1000 x 1 Watt x 3600 seconds = 36 x 105 watt-sec
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