engineering recuitment GATE ME 2023-24 Test Series Strength of Materials Simple Stress and Strain Thermal Stress and Strain
A bar is subjected to an increase in temperature and rests on a frictionless surface without restriction. Then choose correct statement(s)
1
Bar is subjected to thermal stress of magnitude \(\sigma= \alpha \bigtriangleup T L\)
2
The bar is subjected to the thermal strain of magnitude \(\in = \alpha \bigtriangleup T L\)
3
The bar is subjected to the thermal strain of magnitude \(\in = \alpha \bigtriangleup T\)
4
No thermal stress is induced in the bar.