Question

22. The coefficient of superficial expansion of a solid is 2 x 10"/°C. It's coefficient of linear expansion is
-
(a) 4 x 10"/°C
(b) 3 x 10 %1°C
(c) 2 x 10"/°C
(d) 1 x 105/°C​

Answer 1

Answer:

Coefficient of given,

Superficial expansion β=20×10

−5

/

0

C

We know that,

6α=3β=2γ

Where α is linear expansion coefficient.

∴6×2×10

−5

=3β

⇒β=2×2×10

−5

=4×10

−5

/

0

C

Hence,

Option A is correct.

Answer 2

Answer:

option D

Explanation:

Here alpha= linear co efficient

beta is aerial or superficial co efficient