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Physics 1987 JAMB Past Questions

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26
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 & Discuss (2) JAMB 1987
27

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 & Discuss (9) JAMB 1987
28
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 & Discuss (7) JAMB 1987
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29
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 & Discuss (4) JAMB 1987
30

A ray of light is incident at an angle of 30o on one top surface of a parallel-sided glass block of refractive index 1.5. The ray finally emerges from the lower surface. What is the angular deviation of the emergent ray?

  • A. 60o
  • B. 39o
  • C. 28o
  • D. 0o
View Answer & Discuss (14) JAMB 1987
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