TS EAMCET Medical 29 Sept 2020 Shift 1 Paper

A steel rod. clamped at its two ends, rests oil a fixed horizontal base. The rod is unstrained at 20 °C. The absolute value of the longitudinal strain developed in the rod if the temperature rises to 60 °C is:
(coefficient linear expansion of steel = 1.2 x 10−5 / °C)