NEET Exam Model Paper 1

Question : 114 of 180

Marks: +1, -0

A wire 3 m in length and 1 mm in diameter at 30°C is kept in a low temperature at −170°C and is stretched by hanging a weight of 10 kg at one end. The change in length of the wire is
[Y=2×1011N/m2,g=10m/s2 and α=1.2×10−5/°C]