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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Length, area and volume

Jamb Physics Questions - Length, area and volume

Question 26:
If a plastic sphere floats in water (density = 1000kgm3) with 0.5 of its volume submerged, and floats in oil with 0.4 of its volume submerged the density of the oil is
  • A 800kgm<sup style='font-size: smaller;'>3</sup>
  • B 1200kgm<sup style='font-size: smaller;'>3</sup>
  • C 1250kgm<sup style='font-size: smaller;'>3</sup>
  • D 2000kgm<sup style='font-size: smaller;'>3</sup>
View Answer & Explanation
Question 27:
\(^{27}_{13}Al\) + \(^{1}_{0}n\) \(\Rightarrow\) \(^{24}_{11}Na\) + X
  • A A proton
  • B A gamma ray
  • C A helium particle
  • D An alpha particle
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Question 28:
The fig above shows the heights of two liquids X and Y when some air is sucked out of the apparatus through the pump P. The diameter of the table in X is twice That of the Tube In Y. What is the relative density of the liquid X with respect to liquid Y
  • A 1/3
  • B 2/3
  • C 3
  • D 6
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Question 29:
The external and internal diameter of a tube are measured as (32 ± 2)mm and (21 ± 1)mm respectively. Determine the percentage error in the thickness of the tube.
  • A 27%
  • B 14%
  • C 9%
  • D 3%
View Answer & Explanation
Question 30:
A weightless vessel of dimensions 4m x 3m x 2m is filled with a liquid of density 1000kgm-3 and sealed. What is the maximum pressure this container can exert on a flat surface? [g = 10ms-2]
  • A 9 x 10<sup style='font-size: smaller;'>4</sup>NM<sup style='font-size: smaller;'>-2</sup>
  • B 4 x 10<sup style='font-size: smaller;'>4</sup>NM<sup style='font-size: smaller;'>-2</sup>
  • C 3 x 10<sup style='font-size: smaller;'>4</sup>NM<sup style='font-size: smaller;'>-2</sup>
  • D 2 x 10<sup style='font-size: smaller;'>4</sup>NM<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation