Question

The amount by which unit length of a material increases when the temperature is raised one degree is called the coefficient of

• A. Cubic expansion
• B. Superficial expansion
• C. Linear expansion
• D. None

Answer 1

Answer: (C)

Linear expansion

On heating a thin rod or wire,the increase in its radius (or breadth or thickness) is negligible as compared to the increase in its length.this for a wire or rod, we consider the expansion in length which is called linear expansion.