Question

The length of each rail is 10m. The linear expansion
of steel is 12 x 107°C and range of variation of
temperature at the given place is 15°C. The gap to be
left between the rails is
1) 0.0018 m
2) 0.0012 m
3) 0.00022m
4) 0.05 m​

Answer 1

Answer:

1-0.0018

Explanation:

$x = l \alpha (change \: in \: temp)$

x= 10×12×10^-7×15

x=1800×10^-7

x=0.00018m

Answer 2

Answer:

Option A

0.0018m

Explanation: