A horizontal steel railroad track has a length of 100 m when the temperature is 25ºC. The track is constrained from expanding or bending. The stress on the strack on a hot summer day, when the temperature is 40ºC, is
(Note : the linear coefficient of thermal expansion for steel is 1.1 × 10‌–5/ºC and the Young's modulus of steel is 2 × 10‌11 Pa)

Question

Examsnet · Accepted Answer

Correct Answer is :  3.3 × 10‌7 Pa

KVPY SX SB Exam 2015 Question Paper