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Friday, 30 October 2026
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Physics Past Questions and Answers

Jamb 1981 Physics Questions

Question 31:
Change of state is accompanied by change of
  • A Temperature
  • B Volume
  • C Heat content
  • D Temperatureb and volume
  • E Volume and heat content
View Answer & Explanation
Question 32:
The quantity (timbre) of sound depends on
  • A Amplitude
  • B Frequency
  • C Harmonics
  • D Velocity
  • E Wavelength
View Answer & Explanation
Question 33:
The mass of a proton is approximately equal to that of
  • A An \(\alpha\)-particle
  • B A \(\beta\)-particle
  • C \(\gamma\)-ray
  • D An electron
  • E A neutron
View Answer & Explanation
Question 34:
An object placed on the principle axis of a convex lens of focal length 10m produces a real image of double magnification. The image distance from the lens is
  • A 30cm
  • B 25cm
  • C 20cm
  • D 15cm
  • E 10cm
View Answer & Explanation
Question 35:
A liquid-in-glass thermometer should quickly register temperature changes. This is achieved by choosing a liquid that
  • A Is opaque
  • B Has high density
  • C Has regular expansion
  • D Has a high thermal conductivity
  • E Can wet glass
View Answer & Explanation