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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Pressure

Jamb Physics Questions - Pressure

Question 6:
The hatch door of a submarine has an area of 0.5m2. The specific gravity of sea water is 1.03. Assume that g = 10ms-1,and neglect the atmospheric pressure. The force exerted by the sea water on the hatch door at a depth of 200m is
  • A 1.03 x 10<sup style='font-size: smaller;'>5</sup>N
  • B 1.03 x 10<sup style='font-size: smaller;'>4</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • C 1.06 x 10<sup style='font-size: smaller;'>5</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • D 2.06 x 10<sup style='font-size: smaller;'>6</sup>N
  • E 1.03 x 10<sup style='font-size: smaller;'>3</sup>N
View Answer & Explanation
Question 7:
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
View Answer & Explanation
Question 8:
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
View Answer & Explanation
Question 9:
If a water pump at Kainji Dam is capable of lifting 1000kg of water through a vertical height of 10m in 10s, the power of the pump is [g = 10ms-2]
  • A 1.0kW
  • B 10.0kW
  • C 12.5kW
  • D 15.0kW
  • E 20.0kW
View Answer & Explanation
Question 10:
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
View Answer & Explanation