Question

If a is the Coefficient of linear expansion of block and L denotes length​

Answer 1

Answer:

Explanation:

No. The coefficient of linear expansion for each material simply tells us by how much will the material expand (or contract) per unit length. The longer the specimen, the more it will expand (or contract), but its coefficient of linear expansion does not change and does not depend on the length of the specimen.

Answer 2

Answer:

Sorry I have only example

Explanation:

Correct option is

B

option

Since α increases linearly, we can take the α

eq

as average of α

1

and α

2

.

α

eq

=

2

α

1

+α

2

Δl=l

0

α

eq

Δθ=l(

2

α

1

+α

2

)×10=5l(α

1

+α

2

) since Δθ=10

0