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Physics 1987 JAMB Past Questions

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21
A wave has a frequency of 2Hz and a wavelength of 30cm. The velocity of the wave is
  • A. 60.0ms-1
  • B. 6.0ms-1
  • C. 1.5ms-1
  • D. 0.6ms-1
View Answer & Discuss (10) JAMB 1987
22
A boat at anchor is rocked by waves whose crest are 100m apart and whose velocity is 25ms-1. At what interval does the wave crest reach the boat?
  • A. 2500.00s
  • B. 75.00s
  • C. 4.00s
  • D. 0.25s
View Answer & Discuss (4) JAMB 1987
23
Which of the following instruments has a pure tone?
  • A. guitar
  • B. vibrating strings
  • C. tuning fork
  • D. siren
View Answer & Discuss (7) JAMB 1987
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24

The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 150Hz?

  • A. 1
  • B. 2
  • C. 3
  • D. 4
View Answer & Discuss (11) JAMB 1987
25
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 & Discuss (4) JAMB 1987
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