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Wednesday, 20 May 2026
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Physics Past Questions and Answers

Jamb 1986 Physics Questions

Question 26:
A pencil is placed vertically between a concave mirror and its focal point. The image of the pencil in the mirror will be
  • A Real, inverted and diminished
  • B Virtual, inverted and enlarged
  • C Real, erect and enlarged
  • D Virtual, erect and enlarged
View Answer & Explanation
Question 27:
A wave of frequency 10Hz forms a stationary wave pattern in a medium where the velocity is 20cms-1. The distance between adjacent nodes is
  • A 1.0cm
  • B 1.5cm
  • C 2.0cm
  • D 5.0cm
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Question 28:
Which of the following is true of the loudness of sound? It
  • A Depends on the square of the amplitude of the vibrating body
  • B Is proportional to the distance of the observer from the source of the sound
  • C Is greatest in vacuum
  • D Is dependent in vacuum
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Question 29:
A man clapping his hands at regular intervals observes that the echo of a clap coincides with the next clap. If the reflecting cliff is 160m away and the speed of sound is 320ms-1, what is the frequency of the clapping?
  • A 1 Hz
  • B 2Hz
  • C 4Hz
  • D 8Hz
View Answer & Explanation
Question 30:
The vibration of an air column produces the sound in the
  • A Piano
  • B Guiter
  • C Flute
  • D School handbell
View Answer & Explanation