Pressure - Jamb Physics Past Questions and Answers

Question 16:

• JAMB 1983

Which of the following statements is true about liquid pressure is NOT correct? The pressure

A. At a point in a liquid is proportional to the depth
B. At any point in a liquid is the same at the same level
C. Is exerted equally in all directions at any point
D. Of a liquid at any point on the wall of its container acts in a direction perpendicular to the wall
E. At a particular depth depends on the shape of the vessel

Question 17:

• 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 18:

• JAMB 1983

the image above shows an inverted U-tube with the open end, O of one limb below the level, W of water in the tank, in order that water should begin to flow from the tank it is is necessary that

A. The U-tube is completely filled with water and that P should be higher that W
B. P should be lower than O and W
C. P should be lower than W and O should reach the botton of the table
D. The U-tube is completely filled with water and that P should be lower that W

Question 19:

• 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 20:

• 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