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Friday, 22 May 2026
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Physics Past Questions and Answers

Jamb 1998 Physics Questions

Question 11:
A parachute attains a terminal velocity when
  • A Its density is equal to the density of air
  • B The viscous force of the air and the upthrust completely counteract its weight
  • C It expands as a result of reduced external pressure
  • D The viscous force of the air is equal to the sum of the weight and upthrust
View Answer & Explanation
Question 12:
In a wheel and axle mechanism the diameters of the wheel and axle are 40cm and 8cm respectively. Given that the machine is 80% efficient, what effort is required to lift a load of 100N?
  • A 20N
  • B 25N
  • C 50N
  • D 80N
View Answer & Explanation
Question 13:
The tendon in a man's leg is 0.01m long. If a force of 5N stretches the tendon by 2.0 x 10-5m, calculate the strain on the muscle.
  • A 5 x 10<sup style='font-size: smaller;'>6</sup>
  • B 5 x 10<sup style='font-size: smaller;'>2</sup>
  • C 2 x 10<sup style='font-size: smaller;'>-3</sup>
  • D 2 x 10<sup style='font-size: smaller;'>-7</sup>
View Answer & Explanation
Question 14:
Which of these statements are correct for the pressures in liquids? i. pressure in a liquid at a point acts equally in all directions. ii. pressure increases with depth. iii. pressure at a depth depends on the shape of the container. iv. pressure at the same depth in different liquids are proportional to the density at different liquids.
  • A I, ii, iii only
  • B I, ii, iv only
  • C I, iii, iv only
  • D Ii, iii, iv only
View Answer & Explanation
Question 15:
The atmospheric pressure due to water is 1.3 x 106Nm-2. What is the total pressure at the bottom of an ocean 10m deep? [Density of water = 1000kgm-3, g = 10ms-2]
  • A 1.3 x 10<sup style='font-size: smaller;'>7</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • B 1.4 x 10<sup style='font-size: smaller;'>6</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • C 1.4 x 10<sup style='font-size: smaller;'>5</sup>Nm<sup style='font-size: smaller;'>-2</sup>
  • D 1.0 x 10 <sup style='font-size: smaller;'>5</sup>Nm<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation