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Physics 1978 JAMB Past Questions

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36
an object 1cm high placed on the axis 15cm from a converging lens forms an image 30cm from the lens. The size of the image is
  • A. 0.5cm
  • B. 1.5cm
  • C. 3cm
  • D. 2.5m
  • E. 2cm
View Answer & Discuss (3) JAMB 1978
37

The visible part of light consists of the following colours

  • A. red, indigo, infra-red, violet, yellow, green and blue
  • B. red, green, blue, violet, indigo, orange and yellow
  • C. blue, ultra-violet, infra-red, red, yellow, indigo, violet,green and orange
  • D. infra-red and ultra-violet
  • E. red, orange, yellow, green, blue, indigo and infra-red
View Answer & Discuss (18) JAMB 1978
38
An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit distance from each mirror, the number of images formed is
  • A. 1
  • B. 2
  • C. 3
  • D. 4
  • E. 5
View Answer & Discuss (2) JAMB 1978
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39

The angular dispersion of a prism depends on

  • A. the index of refraction only
  • B. the angle of incidence as well as the index of refraction
  • C. the angle of incidence only
  • D. the thickness of the prism
  • E. the prism angle
View Answer & Discuss (21) JAMB 1978
40
Which of the following is true for the image formed by a convex mirror? i. the image is always virtual ii. the image is always erect iii. the image lies between pole and focus iv. the image is never magnified v. the focus length is negative
  • A. i only
  • B. i and ii only
  • C. ii and iii only
  • D. i, ii, iii and iv only
  • E. all five
View Answer & Discuss (19) JAMB 1978
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