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 61: The wave theory of light does not explain photoelectricity because Options:
  A) light waves carry little energy
  B) particles cannot be emitted by waves
  C) the frequency of light waves too high
  D) there is a threshold wavelength for electron emission
  E) the wavelength of Light waves is too short.
  Show Answer
  The correct answer is A .
• Question 62: What is the approximate critical angle for total internal reflection for diamond if the refractive index of diamond is 2.42? Options:
  A) 21^o
  B) 22^o
  C) 23^o
  D) 24^o
  Show Answer
  The correct answer is D .
• Question 63: Which of the following pairs of musical instruments produce sound due to the vibration of air column? Options:
  A) Bell and piano
  B) Guitar and flute
  C) Trumpet and drum
  D) Trumpet and flute
  E) Violin and organ
  Show Answer
  The correct answer is D .
• Question 64: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 65: The time t₁, t₂ and t₃ for 20 complete oscillations of a simple pendulum experiment are 32.0s, 34.6s and 35.5s respectively. Calculate the mean period of the pendulum. Options:
  A) 1.60s
  B) 1.70s
  C) 1.73s
  D) 1.78s
  E) 5.11s
  Show Answer
  The correct answer is B .
• Question 66: An electric current of 3Aflowing through an electric heating elements of resistance 20 embedded in 1,000g of an oil raises the temperature of the oil by 10^oC in 10 seconds then the specific heat capacity of the oil is Options:
  A) 1.8Jg^-1oC
  B) 0.6Jg^-1oC
  C) 0.18Jg^-1oC
  D) 18Jg^-1oC
  E) 0.06Jg^-1oC
  Show Answer
  The correct answer is C .
• Question 67: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 68: The radioisotope ${}_{92}^{235}U$ decays by emitting two alpha particles, three beta particles and a gamma ray. What is the mass and atomic number of the resulting element? Options:
  A) 215 and 88
  B) 91 and 227
  C) 227 and 91
  D) 92 and 238
  Show Answer
  The correct answer is C .
• Question 69:

  The rate of diffusion of gases increases with increase(s) in I. density

  II. temperature

  III, mass. Which is/are correct?

  Options:
  A) I only
  B) II only
  C) I and II only
  D) II and III only
  E) I, II and III
  Show Answer
  The correct answer is B .
• Question 70: A short response time is obtained in a liquid-in-glass thermometer when the Options:
  A) bulb is large and thick-walled
  B) bulb is small and thick-walled
  C) stem is long and thin
  D) liquid is of high density and the bulb is large
  E) bulb is thin-walled and the liquid is a good conductor of heat.
  Show Answer
  The correct answer is E .