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Newton's Law of cooling is applicable only-

  1. When the temperature change of the surrounding with time is very small.
  2. When the temperature change of the surrounding with time is very high.
  3. Temperature difference between the surrounding and the body is independent cooling rate
  4. All of the above

Answer (Detailed Solution Below)

Option 1 : When the temperature change of the surrounding with time is very small.
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Detailed Solution

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CONCEPT:

  • Newton's Law of Cooling: It states that the rate of cooling or rate of loss of heat is directly proportional to the difference between the temperature of the body, Temperature of the surrounding medium, Nature, and extent of the exposed surface.
    • The temperature change of the surrounding with time should be is very small.


EXPLANATION: 

  • Newton's law of cooling states that rate of cooling or rate of loss of heat is directly proportional to:
    • The temperature of the body.
    • The temperature of the surrounding medium.
    • Nature, and extent of the exposed surface.
  • The temperature change of the surrounding with time should be is very small otherwise it will contradict Newton's law of cooling.
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