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Sunday, 24 May 2026
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Physics Past Questions and Answers

Jamb 2020 Physics Questions

Question 16:
A solid weighs 4.8g in air, 2.8g in water and 3.2g in Kerosine. The ratio of density of the solid to that of the kerosine is
  • A 2
  • B \(\frac{3}{2}\)
  • C \(\frac{2}{3}\)
  • D 3
View Answer & Explanation
Question 17:
One of the following readings represents the measurement of the length of a metal rod using vernier callipers. Taking the reading accuracy into consideration, the most likely one is
  • A 5.16cm
  • B 5.165cm
  • C 5.0cm
  • D 5.160cm
View Answer & Explanation
Question 18:
When a sound wave passes from air into water its
  • A Speed and frequency increases but its wavelength remains the same
  • B Speed and wavelength increases but its frequency remains the same
  • C Speed decreases
  • D Speed increases but its frequency and wavelength decreases
View Answer & Explanation
Question 19:
A convex mirror is used as a driving mirror because I. its image is erect II. It has a large field of view III. It has a long focal length Identify the CORRECT statement(s)
  • A I and III only
  • B I and II only
  • C II and IIII only
  • D I, II and III only
View Answer & Explanation
Question 20:
[examqimage]https://www.schoolngr.com/eattachments/8bdc6358557cb2b4a88ce8a67b37df98aaf26937[/examqimage] Two mirrors of the same length are arranges as show in the diagram. A ray of light NO strikes the system at O and emerges along PQ. The emergent ray has been deviated through
  • A 220\(^o\)
  • B 200\(^o\)
  • C 210\(^o\)
  • D 180\(^o\)
View Answer & Explanation