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Monday, 15 June 2026
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Physics Past Questions and Answers

Jamb 1978 Physics Questions

Question 41:
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
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Question 42:
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
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Question 43:
A string is sustaining a stationary wave when
  • A The frequency of the wave is not proportional to the wavelength of the wave
  • B The amplitude of vibration is always zero
  • C Two equal waves are travelling in opposite directions
  • D The waves are longitudinal
  • E The frequency is directly proportional to the length of the string
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Question 44:
For the correction of myopic defects in the human eye we require
  • A A convex lens
  • B A concave lens
  • C A combination of concave and convex lenses
  • D A prism
  • E A concave mirror
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Question 45:
Of the following which is different from the other?
  • A X-rays
  • B Gamma-rays
  • C Cathode rays
  • D Ultra violet rays
  • E Infrared rays
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