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Monday, 20 April 2026
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Physics Past Questions and Answers

Jamb 2010 Physics Questions

Question 16:
A vapour is said to be saturated when
  • A A dynamic equilibrium exists between liquid molecules and the vapour molecules
  • B A dynamic aquilibrium exists such that more molecules return to the liquid than are living it
  • C The temperature of the vapour varies
  • D The vapour pressure is atmospheric
View Answer & Explanation
Question 17:
The pressure of one mole of an ideal gas of volume 10-2 m3 at a temperature of 27°c is
[molar gas constant = 8.3 J mol-1 k-1]
  • A 2.49 x 10<sup style='font-size: smaller;'>4</sup> Nm<sup style='font-size: smaller;'>-2</sup>
  • B 2.24 x 10<sup style='font-size: smaller;'>4</sup> Nm<sup style='font-size: smaller;'>-2</sup>
  • C 2.49 x 10<sup style='font-size: smaller;'>5</sup> Nm<sup style='font-size: smaller;'>-1</sup>
  • D 2.24 x 10<sup style='font-size: smaller;'>5</sup> Nm<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 18:
Which of the following has no effect on radiation?
  • A Nature of surface
  • B Density
  • C Surface area
  • D Temperature
View Answer & Explanation
Question 19:
The wavelength of a wave traveling with a velocity of 420 ms-1 is 42 m. what is its period?
  • A 1.2 s
  • B 1.0 s
  • C 0.5 s
  • D 0.1 s
View Answer & Explanation
Question 20:
The sound of an electricity bell dies down slowly when air is slowly pumped out from a bottle because
  • A The wavelength of sound becomes greater in the bottle
  • B Sound cannot pass through the bottle
  • C Sound needs a material medium
  • D Sound can pass through a vacuum
View Answer & Explanation