Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 441: A submarine is observed to rise from a real depth off 80 m to 60 m in water. calculate the change in apparent depth.
  [Refraction index of water (4)/3] Options:
  A) 45 m
  B) 80 m
  C) 15 m
  D) 60 m
  Show Answer
  The correct answer is C .
• Question 442: The frequency of beats produced when two tunning forks of frequencies 258Hz and 270Hz are sounded close to each other Options:
  A) 6Hz
  B) 264Hz
  C) 528Hz
  D) 12Hz
  Show Answer
  The correct answer is D .
• Question 443: A thin converging lens has a power of 4.0 diopters determined its focal length. Options:
  A) 2.50m
  B) 0.03m
  C) 5.00m
  D) 0.25m
  Show Answer
  The correct answer is D .
• Question 444: A piece of cork floats in a liquid. What fraction of its volume will be immersed in the liquid? [Density of the cork = 0.25 x 10³kgm^-3, Density of the liquid = 1.25 x 10³kgm^-3] Options:
  A) 0.8
  B) 0.5
  C) 0.2
  D) 0.1
  Show Answer
  The correct answer is C .
• Question 445: A gas with initial volume of 2 X 10^-6m³ is allowed to expand to six times its initial value at constant pressure of 2 x 10⁵Nm^-2. The work done is Options:
  A) 2.0J
  B) 4. 0 J
  C) 12.0 J
  D) 2.4 J
  Show Answer
  The correct answer is D .
• Question 446: The blade of a hoe feel colder to touch in the morning than the wooden handle because the Options:
  A) handle is a better conductor of heat than blade
  B) handle contains stored energy in form of heat
  C) blade is a better conductor of heat than the handle
  D) blade is placed at a lower temperature than the heat
  Show Answer
  The correct answer is C .
• Question 447: if ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆P_x is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as Options:
  A) ∆x ∆P_x ≥ h
  B) ∆x ∆P_x = 0
  C) ∆x ∆P_x< h
  D) ∆x ∆P_x = ∞
  Show Answer
  The correct answer is A .
• Question 448: A quantity of gas occupies a certain volume when the temperature is -73^oC and the pressure is 1.5 atmospheres. If the pressure is increased to 4.5 atmospheres and the volume is halved at the same time, what will be the new temperature of the gas? Options:
  A) 573^oC
  B) 327^oC
  C) 300^oC
  D) 110^oC
  E) 27^oC
  Show Answer
  The correct answer is E .
• Question 449:

  The linear expansivity of brass is 2 x 10${}^{-5}$ C${}^{-1}$. If the volume of a piece of brass is 15.00cm at 0°C, what is the volume at 100°C

  Options:
  A) 16.03cm${}^3$
  B) 15.09cm${}^3$
  C) 16.00cm${}^3$
  D) 15.03cm${}^3$
  Show Answer
  The correct answer is B .
• Question 450: The speed of light in air is 3 x 10⁸ms^-1. If the refractive index of light from air-to-water is $\frac{4}{3}$, then which of the following is the correct value of the speed of light in water? Options:
  A) 4 x 10⁸ms^-1
  B) 2.25 x 10⁸ms^-1
  C) $\frac{4}{9}$ x 10⁸ms^-1
  D) 2.25 x 10²ms^-1
  E) 4.33 x 10⁸ms^-1
  Show Answer
  The correct answer is B .