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Friday, 22 May 2026
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Physics Past Questions and Answers

Jamb 1993 Physics Questions

Question 11:
The thermometric properties of the thermocouple is that is
  • A E.m.f. changes with temperature
  • B Resistance changes with temperature
  • C Volume changes with temperature
  • D Pressure changes with resistance
View Answer & Explanation
Question 12:
A metal rod 800mm long is heated from 10oC to 95oC. If it expands by 1.36mm, the linear expansivity of the metal is
  • A 2.0 x 10<sup style='font-size: smaller;'>2</sup>K<sup style='font-size: smaller;'>-1</sup>
  • B 2.0 x 10<sup style='font-size: smaller;'>2</sup>K<sup style='font-size: smaller;'>-1</sup>
  • C 5.0 x 10<sup style='font-size: smaller;'>-3</sup>K<sup style='font-size: smaller;'>-1</sup>
  • D 2.0 x 10<sup style='font-size: smaller;'>-5</sup>K<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 13:
When the volume of a given mass of gas is halved and its temperature doubled, the pressure
  • A Remains constant
  • B Increases by a factor of 4
  • C Increases by a factor of 3
  • D Decreases by a factor of 4
View Answer & Explanation
Question 14:
200g of water at 90°C is mixed with 100g of water at 30°C. What is the final temperature?
  • A 50<sup style='font-size: smaller;'>o</sup>C
  • B 60<sup style='font-size: smaller;'>o</sup>C
  • C 70<sup style='font-size: smaller;'>o</sup>C
  • D 80<sup style='font-size: smaller;'>o</sup>C
View Answer & Explanation
Question 15:
The relationship between L and the wavelength I of the stationary wave is
  • A 2L = \(\lambda\)
  • B L = \(\lambda\)
  • C L = \(\frac {\lambda}{3}\)
  • D 4L = 3 \(\lambda\)
View Answer & Explanation