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Physics 2011 WAEC Past Questions

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31
two sound waves have frequencies of 12Hz and 10Hz. Calculate their beats period
  • A. 0.5s
  • B. 1.0s
  • C. 1.2s
  • D. 2.0s
View Answer & Discuss (3) WAEC 2011
32
The main difference between echo and reverberation is that
  • A. reverberation is reflected sound while echo is refracted sound
  • B. the time interval between incident sound and reflecte sound is shorter for reverbration
  • C. the amplitude of an echo is greater
  • D. reverberation is from acoustic speakers while echo comes from clifts
View Answer & Discuss WAEC 2011
33

Which of the following statements about the electromagnetic waves is correct?

  • A. radio waves have longer frequencies than x-rays
  • B. x-rays have the longest wavelength
  • C. some of the waves travel at 3.0 x 108ms-1
  • D. white light occupies a region beyond ultraviolet rays
View Answer & Discuss (11) WAEC 2011
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34
The correct relationship between "G" and "g" in a gravitational field is given by the equation (Where the symbols have their usual meanings)
  • A. g = \(\frac{GM}{R}\)
  • B. g = \(\frac{GM}{R^2}\)
  • C. g = \(\frac{GM^2}{R}\)
  • D. g = \(\frac{GM^2}{R^2}\)
View Answer & Discuss WAEC 2011
35
The capacitance of a parallel-plate capacitor
  • A. decreases when the seperation between the plate decreases
  • B. increases when the optential difference between the plates is increased
  • C. is greater without a dielectric material between the plates than with a dielectric
  • D. is greater with a dielectric between the plates than without a dielectric.
View Answer & Discuss (2) WAEC 2011
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