Pressure - Jamb Physics Past Questions and Answers

Question 26:

• JAMB 1987

As a result of air at the top of a barometer, the height of the mercury column is 73.5cm when it should be 75.0cm; the volume of the space above the mercury is 8.0cm³. Calculate the correct barometer height when the barometer reads 74.0cm and the volume of the space above the mercury is 6.0cm³.

A. 72.0cm
B. 74.5cm
C. 75.1cm
D. 76.0cm

Question 27:

• JAMB 1988

When one arm of a U-tube manometer is connected to a gas supply, the levels of mercury in the two arms of the U-tube is shown in the figure above, if the atmospheric pressure is 76.0cm hg, the gas pressure is

A. 62.6cm hg
B. 72.5cm hg
C. 79.5cm hg
D. 85.9cm hg

Question 28:

• JAMB 1989

Which of the following devices are used to measure pressure? i. Aneroid barometer. ii. hydrometer. iii. hygrometer. iv. manometer.

A. I and iii
B. Ii and iii
C. Iii and iv
D. I and iv

Question 29:

• JAMB 1989

The pressure on the gas of constant gas thermometer at the ice point is 325mm of mercury and at the steam point is 875mm of mercury. Find the temperature when the pressure of the gas is 190mm of mercury

A. 30k
B. 243k
C. 300k
D. 3003k

Question 30:

• JAMB 1990

What is the length of liquid column in a barometer tube that would support an atmospheric pressure of 102000Nm^-2 if the density of the liquid is 2600kgm^-3? [g = 10ms^-2]

A. 0.75m
B. 0.76m
C. 3.92m
D. 39.23m