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 991: Which of the following pairs of phenomena helps in the resolution of the wave-particle paradox of matter? Options:
  A) Compton effect and thermionic emission
  B) Electron diffraction and refraction
  C) emission and absorption of light
  D) Interference and polarization
  E) Reflection and photoelectric effect
  Show Answer
  The correct answer is C .
• Question 992:

  Workdone on an object to bring it to a certain point in space is called

  Options:
  A) Gravitational potential energy
  B) Potential energy
  C) Kinetic energy
  D) Mechanical energy
  Show Answer
  The correct answer is A .
• Question 993: The net charge on the atom is zero because Options:
  A) the electrons and the protons that are charged are in the nucleus
  B) the total charge on the electrons is equal to the total charge on the protons
  C) the neutrons from a shield around the charged protons
  D) the number of electrons in an atom is half the number of protons
  E) A and B above
  Show Answer
  The correct answer is B .
• Question 994: At 4°c, the volume of a fixed mass of water is? Options:
  A) constant
  B) minimum
  C) maximum
  D) zero
  Show Answer
  The correct answer is B .
• Question 995: 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 996:

  0.5kg of water at 10ºC is completely converted to ice at 0ºC by extracting (88000) of heat from it. If the specific heat capacity of water is 4200jkg${}^1$ Cº. Calculate the specific latent heat of fusion of ice.

  Options:
  A) 9.0kjkg${}^{-1}$
  B) 84.0kjkg${}^{-1}$
  C) 134.0kjkg${}^{-1}$
  D) 168.0kjkg${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 997: A man weight 800N climbs up a stairs to height of 15m in 12.5s. What is the man''s average power output? Options:
  A) 667W
  B) 810W
  C) 960W
  D) 15000W
  Show Answer
  The correct answer is C .
• Question 998:

  How much work is done against the gravitational force on a 3.0 kg object when it is carried from the ground floor to the roof of a building, a vertical climb of 240 m?

  Options:
  A) 7.2 kJ
  B) 4.6 kJ
  C) 6.8 kJ
  D) 8.4 kJ
  Show Answer
  The correct answer is A .
• Question 999:

  The working of the beam balance is based on the principle of

  Options:
  A) moments
  B) conservation of energy
  C) equivalence
  D) floatation
  Show Answer
  The correct answer is A .
• Question 1000: The process through which free electrons leave the surface of hot metal is known as? Options:
  A) photon emission
  B) photo emission
  C) thermionic emission
  D) electron emission
  Show Answer
  The correct answer is C .