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Physics 1988 WAEC Past Questions

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31
A boy standing a distance from the foot of a tall cliff claps his hands and hears an echo 0.5s later. If the speed of sound is 340ms1, how far is he from the cliff?
  • A. 17m
  • B. 34m
  • C. 85m
  • D. 170m
  • E. 680m
View Answer & Discuss (3) WAEC 1988
32
A sounding tuning fork is brought near the end of a pipe containing an air column and the loudness of the sound increases. This effect is due to
  • A. diffraction
  • B. an echo
  • C. resonance
  • D. interference
  • E. reverberation
View Answer & Discuss (3) WAEC 1988
33
If the leaves a positively charged electroscope collapse completely as an object is brought near the cap of the electroscope, the objects possesses
  • A. an equal amount of positive charge
  • B. less amount of negative charge
  • C. no charge
  • D. a positive charge
  • E. an equal amount of negative charge
View Answer & Discuss (4) WAEC 1988
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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34

A transformer with 5500 turns in its primary is used between a 240V a. c supply and a 120V kettle. Calculate the number of turns in the secondary

  • A. 11000
  • B. 2750
  • C. 460
  • D. 232
  • E. 10
View Answer & Discuss (7) WAEC 1988
35
Local action is normally prevented from taking place in a simple electric cell by
  • A. introducing an oxidising agent into the acid
  • B. not drawing current continuously for long periods
  • C. amalgamating the surface of the zinc plate
  • D. using a porous pot to isolate the zinc plate from the acid
  • E. using dilute sulphuric acid
View Answer & Discuss (1) WAEC 1988
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