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JAMB Physics 2002 Question 25

Question 25

Quantity of Heat

The time rate of loss of heat by a body is proportional to the

  1. A.temperature of its surroundings
  2. B.temperature of the body
  3. C.difference in temperature between the body and its surroundings
  4. D.ratio of the temperature of the body to that of its surroundings.
Show the answer and explanation

Answer: C (difference in temperature between the body and its surroundings)

Explanation

Newton's law of cooling: the rate of heat loss is proportional to the excess temperature of the body over its surroundings.