Question

For a material if length decreases on heating its a value is
a) Positive
b) Negative
c) Zero
d) Infinite
​

Answer 1

Answer:

For finding the expansion, following equation is used:

L=L

o

(1+αT)

here, L

o

is initial length, L is length at temperature T, α is coefficient of Linear expansion.

So, for the substance to contract on heating, using the above equation.

α should be negative.

HOPE IT WILL HELP YOU...

THANK YOU.

Answer 2

Answer:

answer is a positive...bcz if length decreases with heating then it's quite usual