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 1751: Calculate the mass of the copper deposited during electrolysis when a current of 4A passes through a copper salt for 2 hours. [Ece of Copper z=3.3x10^-7kgC^-1] Options:
  A) 2.9x10⁵kg
  B) 9.5x10^-7kg
  C) 9.5x10^-3kg
  D) 2.9x10⁴kg
  Show Answer
  The correct answer is C .
• Question 1752: Which of the following quantities has the same unit as the watt? Options:
  A) Force x time
  B) Force x distance
  C) Force x acceleration
  D) Force x velocity
  Show Answer
  The correct answer is D .
• Question 1753: The rate of cooling of a heated quantity of liquid in an enclosure depends on the Options:
  A) Pressure of the liquid
  B) Temperature in the enclosure
  C) Pressure of the enclosure
  D) Volume of the liquid
  Show Answer
  The correct answer is B .
• Question 1754: Which of the following instruments helps to maintain the correct humidity and temperature of a building? Options:
  A) A compressor
  B) A refrigerator
  C) Air blower
  D) Air conditioner
  Show Answer
  The correct answer is D .
• Question 1755:

  In the formation of sea breeze, wind blows from?

  Options:
  A) sky to land
  B) sea to sky
  C) land to sea
  D) sea to land
  Show Answer
  The correct answer is D .
• Question 1756:

  An air bubble of radius 4.5 cm initially at a depth of 12 m below the water surface rises to the surface. If the atmospheric pressure is equal to 10.34 m of water, the radius of the bubble just before it reaches the water surface is

  Options:
  A) 6.43 cm
  B) 8.24 cm
  C) 4.26 cm
  D) 5.82 cm
  Show Answer
  The correct answer is D .
• Question 1757: The efficiency of a machine is always less than 100% because the Options:
  A) work output is always greater than the work input
  B) load lifted is always greater than the effort applied
  C) effort applied is always greater than the load lifted
  D) velocity ratio is always greater than the mechanical advantage
  Show Answer
  The correct answer is D .
• Question 1758:

  I. Mass

  II. Density

  III. Temperature

  IV. Nature of substance

  Which of the above affect diffusion?

  Options:
  A) I and II only
  B) I,II and IV only
  C) II, III and IV only
  D) I, II, III and IV
  Show Answer
  The correct answer is B .
• Question 1759: Radio waves belong to the class of wave whose velocity is about Options:
  A) 34m/s
  B) 3 ×10⁶m/s
  C) 3 ×10⁸m/s
  D) 3 × 10^-8m/s
  Show Answer
  The correct answer is C .
• Question 1760:

  When light of a certain frequency is incident on a metal surface, no photoelectrons are emitted. If the frequency of the light is increased, what happens to the stopping potential?

  Options:
  A) The stopping potential does not change.
  B) The stopping potential decreases.
  C) The stopping potential can either increase or decrease, depending on the intensity of the light.
  D) The stopping potential increases.
  Show Answer
  The correct answer is D .