Question

Define the coefficient of linear expansion. Give its SI unit.

Answer 1

Explanation:

1. Expansion means, change or increase in length. If the change in length is along one dimension (length) over the volume, then it is called linear expansion.
2. Coefficient of Linear Expansion is the rate of change of unit length per unit degree change in temperature.
3. It is denoted by ${\alpha }_L$.
4. The SI unit is $K^{-1}$ where $K=Kelvin$.