Newton's law of cooling is relevant with

Options

A. Induced convection
B. radiation
C. melting
D. conduction

Answer

To solve the question regarding Newton's law of cooling, we need to understand what the law states and how it relates to the different modes of heat transfer mentioned in the options.

### Step-by-Step Solution:

1. **Understanding Newton's Law of Cooling**:
Newton's law of cooling states that the rate of heat loss of a body is directly proportional to the difference in temperature between the body and its surroundings, provided this temperature difference is small.

2. **Identifying Relevant Concepts**:
The law primarily deals with the cooling of an object due to heat transfer to the surrounding environment. The heat transfer can occur through various modes: conduction, convection, and radiation.

3. **Analyzing the Options**:
- **Induced Convection**: This refers to the movement of fluid (liquid or gas) that carries heat away from the surface of the object. While convection is a mode of heat transfer, Newton's law of cooling does not specifically address induced convection.
- **Radiation**: This is the emission of energy as electromagnetic waves. Newton's law of cooling is closely related to radiation as it describes how a hot object loses heat to its cooler surroundings through radiation.
- **Melting**: This is a phase change process and is not directly related to Newton's law of cooling.
- **Conduction**: This is the transfer of heat through a material without the movement of the material itself. While conduction is a mode of heat transfer, Newton's law of cooling is more focused on the overall heat loss rather than just conduction.

4. **Conclusion**:
Based on the analysis, Newton's law of cooling is most relevant to the concept of radiation, as it describes how heat is lost from a hot object to its surroundings through radiative processes.

### Final Answer:
Newton's law of cooling is relevant to **radiation**.

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