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 1891:

  If a light wave has a wavelength of 500nm in air what is the frequency of the wave?

  [c = 3 x 10⁸ ms^-1]

  Options:
  A) 3.0 x 10¹⁴ Hz
  B) 6.0 x 10¹⁴ Hz
  C) 6.0 x 10¹² Hz
  D) 2.5 x 10¹⁴ Hz
  Show Answer
  The correct answer is B .
• Question 1892:

  Calculate the heat energy required to vaporize 50g of water initially at 80ºCif the specific heat capacity of water is 4.23jg${}^{-1}$k${}^{-1}$ (specific latent heat of vaporization of water is 2260jg${}^{-1}$

  Options:
  A) 530000J
  B) 23200J
  C) 17200J
  D) 130000J
  Show Answer
  The correct answer is D .
• Question 1893: The north pole of a magnet can never be separated from the south pole because of the property knowledge as? Options:
  A) magnetic octopole
  B) magnetic monopole
  C) magnetic dipole
  D) magnetic quadrupole
  Show Answer
  The correct answer is C .
• Question 1894: Shadows and eclipses result from the Options:
  A) refraction of light
  B) rectilinear propagation of light
  C) defraction of light
  D) reflection of light
  Show Answer
  The correct answer is B .
• Question 1895: The expansion of solids can be considered a disadvantage in the Options:
  A) balance wheel of a watch
  B) fitting of wheels on rims
  C) fire alarm
  D) thermostat
  Show Answer
  The correct answer is B .
• Question 1896: An object of mass 50kg is released from a height of 2m.Find the kinetic energy just before it strikes the ground Options:
  A) 250J
  B) 1000J
  C) 10 000J
  D) 100 000J
  Show Answer
  The correct answer is B .
• Question 1897: At what depth below the sea-level would one experience a change of pressure equal to one atmosphere? Density of sea water = 1013kg^-3, one atmosphere = 0.01 x 10⁵Nm^-2, g = 10ms^-2 Options:
  A) 0.1m
  B) 1.0m
  C) 10.0m
  D) 100.0m
  Show Answer
  The correct answer is C .
• Question 1898: A calibrated potentiometer is used to measure the e.m.f. of a cell because the Options:
  A) internal resistance of a cell is small compared with that of the potentiometer
  B) potentiometer has a linear scale
  C) potentiometer takes no current from the cell
  D) resistance of the potentiometer is less than that of a voltmeter
  Show Answer
  The correct answer is C .
• Question 1899: A piece of substance of specific head capacity 450JKg^-1K^-1 falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms^-2] Options:
  A) 2/9°C
  B) 4/9°C
  C) 9/4°C
  D) 9/2°C
  Show Answer
  The correct answer is B .
• Question 1900: If the distance between the object and the pinhole of a pinhole camera is reduced by half the size of the image of the object Options:
  A) Is quadrupled
  B) Is halved
  C) Remains the same
  D) Is double
  Show Answer
  The correct answer is D .