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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 6:
An object 15cm high is 30cm from pin-hole camera. If the height of the image formed at the back of the camera is 10cm, the image distance is
  • A 20cm
  • B 45cm
  • C 54cm
  • D 63cm
  • E 70cm
View Answer & Explanation
Question 7:
1,000 identical drops of oil of density 500kgm-3 have a total mass of 5 x 10-4kg. One of the drops forms a thin film of area 0.5m2 on water. The thickness of the film is
  • A 2 x 10<sup style='font-size: smaller;'>-8</sup>m
  • B 2 x 10<sup style='font-size: smaller;'>-9</sup>m
  • C 2 x 10<sup style='font-size: smaller;'>-7</sup>m
  • D 3 x 10<sup style='font-size: smaller;'>-9</sup>m
  • E 2.8 x 10<sup style='font-size: smaller;'>-8</sup>m
View Answer & Explanation
Question 8:
What volume of alcohol with a density of 8.4 x 102kgm-3 will have the same mass as 4.2m3of petrol whose density is 7.2 x 102kgm-3?
  • A 14m<sup style='font-size: smaller;'>3</sup>
  • B 3.6m<sup style='font-size: smaller;'>3</sup>
  • C 4.9m<sup style='font-size: smaller;'>3</sup>
  • D 5.0m<sup style='font-size: smaller;'>3</sup>
  • E 5.8m<sup style='font-size: smaller;'>3</sup>
View Answer & Explanation
Question 9:
A metal cube of volume 103mm3 is lowered into a measuring cylinder containing water. If the internal cross-sectional area of the cylinder is 1.5 x 102mm2, by how much does the water level rise in the cylinder?
  • A 6.67 x 10<sup style='font-size: smaller;'>0</sup>mm
  • B 8.50 x 10<sup style='font-size: smaller;'>2</sup>mm
  • C 1.15 x 10<sup style='font-size: smaller;'>3</sup>mm
  • D 2.50 x 10<sup style='font-size: smaller;'>3</sup>mm
  • E 1.50 x 10<sup style='font-size: smaller;'>5</sup>mm
View Answer & Explanation
Question 10:
Two thermo flasks of volume Vx and Vy are filled with liquid water at an initial temperature of 0oC. After sometime the temperature were found to be 9x, 9y, respectively. Given that \(\frac{Vx}{Vy}\) = 2 and \(\frac{\theta x}{\theta y}\) = \(\frac{1}{2}\) the ratio of the heat flow into the flask is
  • A \(\frac{1}{4}\)
  • B \(\frac{1}{2}\)
  • C 4
  • D 1
  • E 2
View Answer & Explanation