Question

111. A metal bar of length 100 mn is inserted
between two rigid supports and its temperature is
increased by 10°C if the coefficient of the thermal
expansion is 12 x 10-7°C and Young s modulus is
2 x 105 MPa The stress in the bar is
[A] Zero [B] 2 Mpa [C] 24 Mpa [D] 2400 Mpa​

Answer 1

Answer:

24 MPa

Explanation:

Stress = E × strain

  = Eαt

=2 × 105 × 12 × 10-6 × 10 =24 mPa