NEET Physics Thermal Expansion MCQ Question
Consider a diagram showing a rod of a material with fixed ends at a low temperature. As the temperature increases, the rod wants to expand but is unable to do so due to the fixed ends. Which statement best describes the resulting stress in the rod?
The rod experiences tensile stress.
The rod experiences compressive stress.
The rod remains stress-free.
The rod experiences lateral stress only.
Correct Answer
Detailed Explanation
When a rod is prevented from expanding by fixing its ends, it is subjected to compressive stress due to the external forces provided by the rigid supports.
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