Consider a 250mmx15mmx10mm steel bar which is free to expand is heated from 15C to 40C. what will be developed?

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Q. Consider a 250mmx15mmx10mm steel bar which is free to expand is heated from 15C to 40C. what will be developed?

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✅ Correct Answer: (D) no stress

Explanation: if we resist to expand then only stress will develop. here the bar is free to expand so there will be no stress.

if we resist to expand then only stress will develop. here the bar is free to expand so there will be no stress.

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