A wire of length 100.0m at 30° has linear expansive of 2×10^-5K−¹ Calculate the length of the wire at a temperature of – 10°C

A. 100.08m
B. 100.04m
C. 99.96m
D. 99.92m

Correct Answer:

Option D – 99.92m

Explanation

L2=L1+α(θ2−θ1)

= 100 + 0.00002(-10-30) = 99.92