PHYSICS

JAMB 2018 - Question 27

Physics 2018 JAMB Past Questions - Question 27: The time rate of loss of heat by a body is proportional to the

Choose the correct answers from the options given.
The time rate of loss of heat by a body is proportional to the
A:
B:
C:
D:
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Correct Answer

C

Explanation

temperature difference between the body and its surroundings. This relationship is known as Newton's Law of Cooling. According to Newton's Law of Cooling, the rate at which heat is lost by a body is directly proportional to the temperature difference between the body and its surroundings. In mathematical terms, it can be expressed as:

Q = -k * (T - Ts)

Where:
- Q is the rate of heat loss
- k is the proportionality constant
- T is the temperature of the body
- Ts is the temperature of the surroundings

The negative sign indicates that heat is being lost from the body. The proportionality constant, k, depends on various factors such as the nature of the body, its surface area, and the medium through which heat is being transferred.