Thermal Expansion - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1985

A thin aluminum plate has a surface area of 1500m^{[/sup] at 20[sup]o}C. What will be its surface area when it is cooled to -20^oC? (Take the linear expansivity of aluminum to be 2.5 x 10^-5k^-1).

A. 1.503m²
B. 1.500m²
C. 1.498m²
D. 1.497m²
E. 1.490m²

Question 7:

• JAMB 1985

Water shows anomalous behaviour.

A. Below 0^oC
B. Between 0^{oC and 4[sup]o}C[/sup]
C. At exactly 4^oC
D. Between 4^{oC and 100[sup]oC}[/sup]
E. Above 100^oC

Question 8:

• JAMB 1986

The expansion of solids can be considered a disadvantage in the

A. Balance wheel of a watch
B. Fitting of wheels on rims
C. Fire alarm
D. Thermostat

Question 9:

• JAMB 1987

The length of a side of a metallic cube at 20^oC is 5.0cm. Given that the linear expansivity of the metal is 4.0 x 10^-5k^-1, find the volume of the cube at 120^oC .

A. 126.50cm³
B. 126.25cm³
C. 126.00cm³
D. 125.00cm³

Question 10:

• JAMB 1987

In which of the following are the substance arranged in descending order of their thermal conductivities?

A. Copper, steel, glass
B. Steel, copper, glass
C. Steel, glass, copper
D. Copper, glass, steel