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Wednesday, 20 May 2026
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Physics Past Questions and Answers

Jamb 1981 Physics Questions

Question 1:
The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths of the mercury thread when the length is 12cm, the temperature is
  • A 32<sup style='font-size: smaller;'>o</sup>C
  • B 48<sup style='font-size: smaller;'>o</sup>C
  • C 56<sup style='font-size: smaller;'>o</sup>C
  • D 65<sup style='font-size: smaller;'>o</sup>C
  • E 75<sup style='font-size: smaller;'>o</sup>C
View Answer & Explanation
Question 2:
The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths of the mercury thread when the length is 12cm, the temperature is
  • A 32<sup style='font-size: smaller;'>o</sup>C
  • B 48<sup style='font-size: smaller;'>o</sup>C
  • C 56<sup style='font-size: smaller;'>o</sup>C
  • D 65<sup style='font-size: smaller;'>o</sup>C
  • E 75<sup style='font-size: smaller;'>o</sup>C
View Answer & Explanation
Question 3:
A vapour is said to be saturated when
  • A Moer molecules return to the liquid than leave it
  • B A dynamic equilibrium exists between the liquid molecules and the vapour molecules at a given temperature
  • C The vapour pressure is atmospheric
  • D The temperature of the vapour varies
  • E All molecules are moving with the same speed
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Question 4:
The latent heat of fusion of a substance is the heat required to
  • A Raise the temperature of unit mass of the substance by 1 <sup style='font-size: smaller;'>o</sup>C
  • B Maintain unit mass of the substance at constant temperature
  • C Change unit mass of substance from solid to liquid at constant temperature
  • D Change unit mass of liquid to vapour at constant temperature
  • E Raise the temperature of unit mass by 100<sup style='font-size: smaller;'>o</sup>C
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Question 5:
The following types of waves are transverse EXCEPT
  • A Light waves
  • B Radio waves
  • C Sound waves
  • D Surface waves on water
  • E X-rays
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