Search SchoolNGR

Tuesday, 18 August 2026
Register . Login

Physics Past Questions and Answers

Topic: Structure of Matter and Kinetic Theory

Jamb Physics Questions - Structure of Matter and Kinetic Theory

Question 141:
The ground stated energy for the hydrogen atom is 5.44 x 10-19J . If an electron drops from zero energy to ground state, calculate the frequency of the emitted radiation.
[h = 6.6 x 10-34 Js]
  • A 5.0 x 10<sup style='font-size: smaller;'>16</sup> Hz
  • B 2.0 x 10<sup style='font-size: smaller;'>16</sup> Hz
  • C 5.0 x 10<sup style='font-size: smaller;'>15</sup> Hz
  • D 2.0 x 10<sup style='font-size: smaller;'>15</sup> Hz
  • E No correct option
View Answer & Explanation
Question 142:
THe velocity of sound in air at 16oC is 340ms-1. What will it be when the pressure is doubled and its temperature raised to 127oC?
  • A 400 ms<sup style='font-size: smaller;'>-1</sup>
  • B 4,000 ms<sup style='font-size: smaller;'>-1</sup>
  • C 8,000 ms<sup style='font-size: smaller;'>-1</sup>
  • D 160,000 ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 143:
A carpenter on top of a roof of 20.0m high dropped a hammer of mass 1.5 kg and it fell directly to the ground. the kinetic energy of the hammer just before hitting the ground is?[g = 10 ms-2]
  • A 600 J
  • B 150J
  • C 300 J
  • D 450 J
View Answer & Explanation
Question 144:
If a tube of small radius opened at both ends is placed in a liquid, the liquid will
  • A Remain at the same level irrespective of whether the liquid wet the glass or not
  • B Fall below the liquid level if the liquid wets the glass
  • C Falls below the liquid level if the liquid does not wet the glass
  • D Rise above the liquid level if the liquid does not wet the glass
View Answer & Explanation
Question 145:
I. change of state
II. Diffusion
III. Radiation
IV. Osmosis
which of the processes above can be explained using the kinetic theory?
  • A I, II,III and IV
  • B I, II and III
  • C I, III and IV
  • D I, II and IV
View Answer & Explanation