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Wednesday, 28 October 2026
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Physics Past Questions and Answers

Jamb 1999 Physics Questions

Question 41:
The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct
  • A The solid will fall over if the vertical line through G lies outside the base
  • B The solid will fall over if the vertical line through lies inside the base
  • C The solid will not fall over if the vertical line through G lies outside the base
  • D The solid can never fall over
View Answer & Explanation
Question 42:
The diagram above shows a lift pump with valves at P and Q. During a downward stroke of the piston
  • A Both valves are open
  • B P is open while Q is closed
  • C P is closed while Q is open
  • D Both valves are closed
View Answer & Explanation
Question 43:
In the J-tube above, Y and X are on the same horizontal level and 30cm3 of air is trapped above Y when the atmospheric pressure is 75cm Hg, calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X
  • A 15 cm<sup style='font-size: smaller;'>3</sup>
  • B 25 cm<sup style='font-size: smaller;'>3</sup>
  • C 35 cm<sup style='font-size: smaller;'>3</sup>
  • D 45 cm<sup style='font-size: smaller;'>3</sup>
View Answer & Explanation
Question 44:
The diagram above represents a transverse electromagnetic wave travelling with speed 3.0 x 108ms-1. What is the frequency of the wave.
  • A 3.0 x 10<sup style='font-size: smaller;'>7</sup>Hz
  • B 9.0 x 10<sup style='font-size: smaller;'>7</sup>Hz
  • C 1.0 x 10<sup style='font-size: smaller;'>9</sup>Hz
  • D 3.0 x 10<sup style='font-size: smaller;'>9</sup>Hz
View Answer & Explanation
Question 45:
The diagram above shows the prism arrangement in a
  • A Binocular
  • B Spectrometer
  • C Periscope
  • D Projector
View Answer & Explanation