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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Pressure

Jamb Physics Questions - Pressure

Question 11:
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
View Answer & Explanation
Question 12:
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
View Answer & Explanation
Question 13:
Mercury is suitable as a barometric fluid because it
  • A Expands uniformly
  • B Is opaque
  • C Is several times denser than water
  • D Is a good conductor of heat
View Answer & Explanation
Question 14:
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
View Answer & Explanation
Question 15:
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
View Answer & Explanation