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Thursday, 30 July 2026
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Physics Past Questions and Answers

Jamb 1993 Physics Questions

Question 16:
Determine the distance between the consecutive antinodes XX if the wavelength is 60cm
  • A 15cm
  • B 30cm
  • C 60cm
  • D 120cm
View Answer & Explanation
Question 17:
Which of the following waves can propagate through a vacuum?
  • A High velocity sound waves
  • B Ultrasonic waves
  • C Acoustic waves
  • D Infra-red waves
View Answer & Explanation
Question 18:
Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10-3S. How far is the aircraft from the antenna? [c = 3 x 108ms-1 ]
  • A 6.0 x 10<sup style='font-size: smaller;'>2</sup>ms<sup style='font-size: smaller;'>-1</sup>
  • B 1.2 x 10<sup style='font-size: smaller;'>3</sup>km
  • C 3.0 x 10<sup style='font-size: smaller;'>3</sup>km
  • D 6.0 x 10 <sup style='font-size: smaller;'>5</sup>km
View Answer & Explanation
Question 19:
Which of the following expressions gives the linear magnification produced by a concave mirror of radius of curvature r, if U and V are the object and image distances respectively?
  • A \(\frac{V}{r}\) - 1
  • B \(\frac{2V}{r}\) - 1
  • C \(\frac{U}{r}\) - 1
  • D \(\frac{2U}{r}\) - 1
View Answer & Explanation
Question 20:
If the focal length of a camera lens is 20cm, the distance from the film at which the lens must be set to produce a sharp image of an object 100cm away is
  • A 17cm
  • B 20cm
  • C 25cm
  • D 100cm
View Answer & Explanation