Question

On heating the rod, the length of the rod increases. On what factors does the increase in length depend on?

• A. The material of the rod
• B. The length of the original rod
• C. The increase in its temperature
• D. None of the above.

Answer 1

Answer: (A), (B), (C)

The correct options are
A

The material of the rod

B

The length of the original rod

C

The increase in its temperature

Increase in length of the rod depends on the material because different materials have different arrangement of atoms.
More the length of the material, more is the expansion with the same increase in temperature e.g. if we double the length of the material, the expansion is also doubled.
When rods of same material and of equal lengths are heated, it is found that expansion is more if rise in temperature is greater.