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Physics 1998 WAEC Past Questions

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36
Which of the following are both mechanical and transverse?
  • A. infra-red rays
  • B. gamma rays
  • C. sound waves
  • D. water waves
  • E. micro waves
View Answer & Discuss WAEC 1998
37
An electromagnetic wave of frequency 5.0 x 1014Hz, is incident on the surface of water of refractive index \(\frac{4}{3}\). Taking the speed of the wave in air as 3.0 x 108ms-1, calculate the wavelength of the wave in water.
  • A. 2.2 x 10-6m
  • B. 1.7 x 10-7m
  • C. 8.0 x 10-7m
  • D. 6.0 x 10-7m
  • E. 4.5 x 10-7m
View Answer & Discuss (5) WAEC 1998
38
The gravitational force of the moon is one-sixth that of the earth. If a body weighs 6.0N on the moon. Calculate its weight on the earth
  • A. 36.0N
  • B. 12.0N
  • C. 6.0N
  • D. 2.0N
  • E. 1.0N
View Answer & Discuss WAEC 1998
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39
In the electrical method of magnetisation, the polarity of the magnet depends on the
  • A. amount of current passed
  • B. direction of current
  • C. magnetic material used
  • D. size of the magnetic material
  • E. orientation of the magnetic material in space
View Answer & Discuss WAEC 1998
40

A cell of e.m.f. 1.5v is connected in series with a resistor of 3\(\Omega\). A high resistance voltmeter connected across the cell registers only 0.9v. Calculate the internal resistance of the cell

  • A. 5.0\(\Omega\)
  • B. 4.5\(\Omega\)
  • C. 2.4\(\Omega\)
  • D. 2.0\(\Omega\)
  • E. 1.8\(\Omega\)
View Answer & Discuss (7) WAEC 1998
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