Question

When a rod is heated, its linear expansion depends on
(a) initial length
(b) area of cross section
(c) mass
(d) temperature rise

• A. only (a) is correct
• B. (a) & (d) are correct
• C. (b) & (c) are correct
• D. (a) & (c) are correct

Answer 1

The correct option is B (a) & (d) are correct

Since linear expansion depends only on nature of material, initial length and temperature rise.
Therefore option (B) is correct.