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Physics 1992 JAMB Past Questions

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21
Which of the following properties make the convex mirror useful as a driving mirror? i. the image is real. ii. the image is erect. iii. it has a wide field of view. iv. the image is magnified.
  • A. i, ii, and iv
  • B. i, ii, iii
  • C. ii and iii
  • D. i and iii
View Answer & Discuss (2) JAMB 1992
22

When an object is placed very close to the pole of a concave mirror, the virtual image obtained is

  • A. diminished and upright
  • B. diminished and inverted
  • C. enlarged and inverted
  • D. enlarged and upright
View Answer & Discuss (5) JAMB 1992
23
A concave mirror has a radius of curvature of 36cm. At what distance from the mirror should an object be placed to give a real image three times the size of the object?
  • A. 12cm
  • B. 24cm
  • C. 48cm
  • D. 108cm
View Answer & Discuss (14) JAMB 1992
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24

Which of the following statements is CORRECT about a long-sighted boy who does not put on glasses?

  • A. He cannot see distant objects clearly
  • B. Rays of light from a close object are focused in front of his retina
  • C. His eye ball is too long
  • D. Parallel rays of light are focused behind his retina
View Answer & Discuss (16) JAMB 1992
25

The speed of light in air is 3 x 10\(^8\)ms\(^{-1}\). What is the speed in glass with a refractive index of 1.50?

  • A. 1.5 x 108ms-1
  • B. 3.0 x 108ms-1
  • C. 2.0 x 108ms-1
  • D. 6.0 x 108ms-1
View Answer & Discuss (4) JAMB 1992
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