Question

The coefficient of cubical expansion is _______ times the coefficient of linear expansion of a solid.

• A. four
• B. three
• C. two
• D. five

Answer 1

The correct option is B three

• β (Coefficient of area/superficial expansion) = 2α (Coefficient of linear expansion)

β = 2α

• γ (Coefficient of cubical expansion) = 3α (Coefficient of linear expansion).

γ = 3α

• If we combine these two equations, we get a relation as α: β: γ = 1: 2 : 3.

α: β: γ = 1: 2 : 3

Thus,
γ = 3α
Option B is correct.