The figure shows four isotropic solids having positive coefficients of thermal expansion. A student predicts the following on heating. Mark each comment true (T) or false (F). (i) The angle α in figur

Question

The figure shows four isotropic solids having positive coefficients of thermal expansion. A student predicts the following on heating. Mark each comment true (T) or false (F).

(i) The angle $α$ in figure (a) will not change.

(ii) The length of the line in figure (b) will decrease.

(iii) The radius of the inner hole will decrease.

(iv) The distance $A B$ will increase.

Source diagram 68

Options:

Answer:

A

Solution:

Uniform thermal expansion preserves angles and increases all lengths.
The line length and inner-hole radius cannot decrease.
The distance $A B$ increases.
The sequence is T, F, F, T.

TestHub · Accepted Answer

Uniform thermal expansion preserves angles and increases all lengths. The line length and inner-hole radius cannot decrease. The distance A B increases. The sequence is T, F, F, T.

Physics - Heat & Thermo Question with Solution | TestHub

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