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Physics 1993 WAEC Past Questions

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26
The quality of a note produced by a vibrating string is determined by the
  • A. pitch of the note
  • B. tension of the string
  • C. material of the string
  • D. presence of overtones
  • E. thickness of the string
View Answer & Discuss (14) WAEC 1993
27
Which of the following is a percussion instrument?
  • A. Flute
  • B. Organ
  • C. Bell
  • D. Piano
  • E. Sonometer
View Answer & Discuss (1) WAEC 1993
28

A short chain is usually attached to the back of a petrol tanker and trailing behind it so that the

  • A. petrol tanker is balanced on the road
  • B. heat generated by friction in the engine can be conducted to the earth
  • C. charges generated by friction in the tanker are conducted to the earth
  • D. tanker can move slowly as the chain touches the road surface
  • E. chain can produce sound in resonance with the noise from the tanker‘s engine
View Answer & Discuss (1) WAEC 1993
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29

Which of the following indicates the correct sequence of steps taken in charging a gold-leaf electroscope by induction? l. Removing the ebonite rod ll. Bringing a negatively charged ebonite rod close to the cap III. Earthing the cap IV. Disconnecting the earthing

  • A. III, II, I and IV
  • B. II, I, III and IV
  • C. III, IV II and I
  • D. II, III, IV and I
  • E. III, IV, I and II.
View Answer & Discuss (2) WAEC 1993
30
Which of the following instruments can be used to compare the relative magnitude of similar charges on two given bodies?
  • A. Electrophorus
  • B. Ebonite rod
  • C. Proof plane
  • D. Gold-leaf electroscope
  • E. Capacitor
View Answer & Discuss (2) WAEC 1993
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