Atmospheric Pressure - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1982

The water manometer above is measuring the pressure of gas supply. if the specific gravity of mercury is 13.6 and the atmospheric pressure is 70cm of mercury what is the total pressure of the gas supply in cm of water

A. 67cm
B. 73cm
C. 949cm
D. 952cm
E. 955cm

Question 7:

• JAMB 1983

If the normal atmospheric pressure in a laboratory supports a column of mercury 0.76m high and the relative density of mercury is 13.8, then the height of water column which atmospheric pressure will support in the same laboratory at the same time is

A. 0m
B. 10m
C. 13m
D. 14m
E. 18m

Question 8:

• JAMB 1985

Two divers G and H are at depths 20m and 40m respectively below the water surface in a lake. The pressure on G is P₁ while the pressure on H is P₂. If the atmospheric pressure is equivalent to 10m of water, then the value of \( \frac{p_2}{p_1} \) is

A. 0.50
B. 0.60
C. 1.67
D. 2.00
E. 3.0

Question 9:

• JAMB 1985

The areas of the effort and load pistons of a hydraulic press are 0.5m² and 5m² respectively. If a force F₁ of 100N is applied on the effort piston, the force F₂ on the load is

A. 10N
B. 100N
C. 500N
D. 1000N
E. 5000N

Question 10:

• JAMB 1985

Normal atmospheric pressure at sea-level is 10⁵Nm^-2 and the acceleration due to gravity is approximately 10ms^-1. If the atmosphere has a uniform density of 1kgm^-3, its height is

A. 100m
B. 1000m
C. 10 000m
D. 100 000m
E. 1000 000m