Solids - Jamb Physics Past Questions and Answers

Question 6:

• 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 7:

• 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 8:

• 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

Question 9:

• JAMB 1990

A bar of initial length /₀ is heated through a temperature change \(\Delta\)t to a new length I. The linear expansivity, a, of the bar is

A. \(\frac{/ - /_o}{/ \Delta t}\)
B. \(\frac{/ - /_o}{/_o \Delta t}\)
C. /_o(1 + \(\Delta\) t)
D. \(\frac{/ - /_o}{/(1 + \Delta t)}\)

Question 10:

• JAMB 1991

A brass rod is 2m long at a certain temperature. What is the length for a temperature rise of 100K, if the expansivity of brass is 18 x 10^-6K^-1?

A. 2.0036m
B. 2.0018cm
C. 2.1800
D. 2.0360m