A metallic bar of Young's modulus $0.5 \times 10^{11}~\text{Nm}^{-2},$<...

Thermal Stress - NEET Physics PYQs

A metallic bar of Young's modulus

0.5%20%5Ctimes%2010%5E%7B11%7D~%5Ctext%7BNm%7D%5E%7B-2%7D%2C

coefficient of linear thermal expansion

10%5E%7B-5%7D%20~%5E%7B%5Ccirc%7D%5Ctext%7BC%7D%5E%7B-1%7D%2C

length

1~%5Ctext%20m

and cross-sectional area

10%5E%7B-3%7D%20~%5Ctext%7Bm%7D%5E2

is heated from

0%5E%5Ccirc%20%5Ctext%7BC%7D

100%5E%5Ccirc%20%5Ctext%20C

without expansion or bending. The compressive force developed in the metallic bar is:

1.	$50%20%5Ctimes%2010%5E3~%20%5Ctext%20N$	2.	$100%20%5Ctimes%2010%5E3%20~%5Ctext%20N$
3.	$2%20%5Ctimes%2010%5E3~%5Ctext%20N$	4.	$5%20%5Ctimes%2010%5E3%20~%5Ctext%20N$