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Tuesday, 19 May 2026
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Physics Past Questions and Answers

Jamb 1987 Physics Questions

Question 26:
Which of the following statements supports the assumption that light travels in straight lines?
  • A Light can be diffracted
  • B A source of light produces distinct shadows of opaque objects
  • C A source of light produces interference patterns on a suitably placed screen
  • D Light can be reflected
View Answer & Explanation
Question 27:
When the length I of a piece of wire under constant tension is varied, the relationship of the frequency of the vibration f\(\alpha\)/ is
  • A F\(\alpha\)/
  • B F\(\alpha \frac{1}{I^2}\)
  • C F \(\alpha\sqrt I\)
  • D F\(\alpha \frac{1}{1}\)
View Answer & Explanation
Question 28:
If an object is placed in front of two mirrors inclined at 90o, how many images will be formed?
  • A Five
  • B Four
  • C Three
  • D Two
View Answer & Explanation
Question 29:
An object 3.0cm high is placed 60.0cm from a converging lens whose focal length is 20.0cm. Calculate the size of the image formed
  • A 0.5cm
  • B 1.5cm
  • C 2.0cm
  • D 6.0cm
View Answer & Explanation
Question 30:
A pool of water appears to be 1.0m deep when viewed vertically from above. If the refractive index of water is 1.33, what is the actual depth of the pool?
  • A 0.750m
  • B 1.013m
  • C 1.330m
  • D 13.3000m
View Answer & Explanation