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Physics 1996 WAEC Past Questions

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31
When a ray of light is incident normally on an air- glass interface, its angle of refraction is
  • A. 0o
  • B. 42o
  • C. 45o
  • D. 60o
  • E. 90o
View Answer & Discuss (1) WAEC 1996
32
The refractive index of a medium relative to air is 1.8. Calculate the critical angle for the medium to the nearest degree.
  • A. 18o
  • B. 34o
  • C. 45o
  • D. 68o
  • E. 90o.
View Answer & Discuss (2) WAEC 1996
33

A converging lens of focal length 5cm forms a virtual image which is 10cm from the lens. How far from the lens is the object?

  • A. 2.0cm
  • B. 3.3cm
  • C. 5.0cm
  • D. 10.0cm
  • E. 15.0cm
View Answer & Discuss (7) WAEC 1996
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34
Which of the following instruments produces sound by the vibration of air column?
  • A. Piano
  • B. Guitar
  • C. Flute
  • D. Hand bell
  • E. Talking drum
View Answer & Discuss WAEC 1996
35
The walls and ceilings of many standard auditoria are covered with perforated pads to
  • A. increase the intensity of sound waves
  • B. increase the loudness of sound waves
  • C. reduce the effect of reverberations of sound waves
  • D. increase the interference effect of sound waves
  • E. decrease the frequency of sound waves.
View Answer & Discuss (5) WAEC 1996
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