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Physics 2003 JAMB Past Questions

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16
On a fairly cool rainy day when the temperature is 20oC, the length of a steel railroad track is 20m. What will be its length on a hot a dry day when the temperature is 40oC?
[coefficient of linear expansion of steel = 11 x 10-6K-1]
  • A. 20.013m
  • B. 20.009m
  • C. 20.004m
  • D. 20.002m
View Answer & Discuss (3) JAMB 2003
17
If an object is placed between two parallel plane mirrors with their reflecting surfaces facing each other, how many images of the object will be formed?
  • A. Infinite
  • B. Eight
  • C. Four
  • D. Two
View Answer & Discuss JAMB 2003
18

The phenomenon where by the water droplets in the atmosphere combines with dust particles in the air to reduce visibility is

  • A. cloud
  • B. mist
  • C. hail
  • D. fog
View Answer & Discuss (23) JAMB 2003
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19
At what position will an object be placed in front of a concave mirror in order to obtain an image at infinity?
  • A. At the pole of the mirror
  • B. At the principal focus
  • C. at the center of the curvature
  • D. Between the principal focus and the center of curvature
View Answer & Discuss (9) JAMB 2003
20
If the distance from a point source of sound is doubled, by what factor does the intensity decrease?
  • A. 4.00
  • B. 2.00
  • C. 0.50
  • D. 0.25
View Answer & Discuss (25) JAMB 2003
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