If a material expands freely due to heating, what type of stress is developed?
- AThermal stress
- BTensile stress
- CCompressive stress
- DNo stressCorrect
Solution
Concept
Free expansion
Step-by-step solution
1. Thermal stress arises only when expansion is restrained.
Explanation
A freely expanding body develops strain but no stress.
Shortcut
Free = no stress.
Common mistake
Thinking heating always causes stress.
Correct answer: D) No stress