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756
Which of the following instruments is used to measure relative humidity?
  • A. Hydrometer
  • B. Barometer
  • C. Manometer
  • D. Hypsometer
  • E. Hygrometer
View Answer & Discuss (1) WAEC 1992
757
A metal of mass 1.5 kg was heated from 27oC to 47oC in 4 minutes by a boiling ring of 75 W rating. Calculate the specific heat capacity of the metal, (Neglect heat losses to the surrounding)
  • A. 2.5 X103J kg-10C-1
  • B. 6.0 X102J kg-10C-1
  • C. 2.5 x 102J kg-10C-1
  • D. 1.4 X102J kg-10C-1
  • E. 1.0 x 102J kg-10C-1
View Answer & Discuss (1) WAEC 1992
758

A ray of light strikes a plane mirror at an angle of incidence i. Determine in terms of i the angle of deviation of the ray after reflection from the mirror.

  • A. i
  • B. 2i
  • C. 90o-i
  • D. 90o+ i
  • E. 180o - 2i
View Answer & Discuss (1) WAEC 1992
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759
Images formed by a convex mirror are always
  • A. inverted, real and diminished
  • B. inverted, virtual and diminished
  • C. erect, virtual and diminished
  • D. erect, real and magnified
  • E. erect, virtual and magnified
View Answer & Discuss (2) WAEC 1992
760
Which of the following statements is not correct for a light ray passing through a rectangular glass block which is surrounded by air? It
  • A. suffers a displacement at the point of emergence
  • B. emerges parallel to the incident ray
  • C. is partly reflected at the point of incidence
  • D. is deviated at the point of emergence
  • E. is reflected in the block
View Answer & Discuss (5) WAEC 1992
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts