The value of coeffecient of expantion of material depends upon

Options

A. Length
B. Area
C. Temperature
D. Volume

Answer

To determine what the coefficient of expansion of a material depends upon, we can break down the problem into a few key points.

### Step-by-Step Solution:

1. **Understanding Coefficient of Expansion**:
The coefficient of linear expansion (α) is defined as the fractional change in length per degree change in temperature. It indicates how much a material expands or contracts when its temperature changes.

2. **Dependence on Temperature**:
The coefficient of expansion is not constant for all temperatures. It varies with temperature; thus, the coefficient of expansion is a function of temperature. As temperature increases, the coefficient may also change, which is an important consideration.

3. **Material Properties**:
The coefficient of expansion is intrinsic to the material itself. Different materials have different atomic structures and bonding, which affect how they respond to temperature changes. For example, metals generally have higher coefficients of expansion compared to ceramics.

4. **Independence from Size**:
While the change in length, area, or volume of a material depends on its original size, the coefficient of expansion itself does not depend on the dimensions (length, area, or volume) of the material. It is a property of the material.

5. **Conclusion**:
Therefore, the coefficient of expansion depends primarily on the material and the temperature. It does not depend on the size or shape of the material.

### Final Answer:
The value of the coefficient of expansion of a material depends upon:
- The type of material (intrinsic property).
- The temperature at which the measurement is taken.