TS EAMCET Medical 8 May 2019 Shift 1 Paper

A steel wire of length 1.5 m and 3.0 mm2 cross-section area at 30 °C is held straight (but under no tension) by attaching the ends to two walls. The coefficient of linear expansion for the wire is 1.0 × 10−5 / °C and Young’s modulus is 2 × 1011 N/m. If the temperature of the wire is decreased to - 10 °C, the total tension in the wire will change by