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 21:

  

  From the diagram above, calculate the total current in the circuit

  Options:
  A) 5.0A
  B) 3.7A
  C) 4.5A
  D) 4.0A
  Show Answer
  The correct answer is B .
• Question 22:

  The mass of water vapour in a given volume of air is 0.05g at 20°C, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air.

  Options:
  A) 3.33%
  B) 5.55%
  C) 33.33%
  D) 55.55%
  Show Answer
  The correct answer is C .
• Question 23: The pressure of one mole of an ideal gas of volume 10^-2 m³ at a temperature of 27°c is
  [molar gas constant = 8.3 J mol^-1 k^-1] Options:
  A) 2.49 x 10⁴ Nm^-2
  B) 2.24 x 10⁴ Nm^-2
  C) 2.49 x 10⁵ Nm^-1
  D) 2.24 x 10⁵ Nm^-1
  Show Answer
  The correct answer is C .
• Question 24: A planet has mass m₁ and is at a distance r, from the sun. A second planet has mass m₂ = 10m₁ and at a distance of r₂ = 2r₁ from the sun. Determine the ratio of the gravitational force experienced by the planets. Options:
  A) 1 : 5
  B) 2 : 5
  C) 3 : 5
  D) 4 : 5
  Show Answer
  The correct answer is B .
• Question 25: The electrochemical equivalent of silver is 0.0012gC^-1. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0mins, the current must be Options:
  A) 6000A
  B) 100A
  C) 10A
  D) 1A
  Show Answer
  The correct answer is B .
• Question 26: The hatch door of a submarine has an area of 0.5m². The specific gravity of sea water is 1.03. Assume that g = 10ms^-1,and neglect the atmospheric pressure. The force exerted by the sea water on the hatch door at a depth of 200m is Options:
  A) 1.03 x 10⁵N
  B) 1.03 x 10⁴Nm^-2
  C) 1.06 x 10⁵Nm^-2
  D) 2.06 x 10⁶N
  E) 1.03 x 10³N
  Show Answer
  The correct answer is E .
• Question 27: The name given to the characteristics behaviour of substances which set their length perpendicular to a strong magnetic field instead of in line with it is Options:
  A) magnetization
  B) paramagnetism
  C) diamagnetism
  D) demagnetism
  E) ferromagnetism
  Show Answer
  The correct answer is A .
• Question 28: Isotopes are nuclei which have Options:
  A) the same number of nuetrons and electrons
  B) equal number of electrons and protons
  C) the same atomic number but different number of neutrons
  D) the same number of total particles
  Show Answer
  The correct answer is C .
• Question 29:

  A body starts from rest and moves with uniform acceleration of 6ms^-2. What distance does it cover in the third seconds

  Options:
  A) 15m
  B) 18m
  C) 27m
  D) 30m
  Show Answer
  The correct answer is A .
• Question 30:

  

  The total resistance measured at PQ in the diagram above is

  Options:
  A) 18.0Ω
  B) 11.0Ω
  C) 4.0Ω
  D) 2.0Ω
  Show Answer
  The correct answer is C .