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 1921:

  Two bodies have masses in the ratio3:1. They experience forces whichimpart to them,acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced

  Options:
  A) 1:4
  B) 2:1
  C) 2:3
  D) 2:5
  Show Answer
  The correct answer is C .
• Question 1922: A thermometer with an arbitrary scale S, of equal division registers -30^oS at the ice point and +90^oS at the steam point. Calculate the Celsius temperature corresponding to 60^oS Options:
  A) 25.0^oC
  B) 50.0^oC
  C) 66.7^oC
  D) 75.0^oC
  Show Answer
  The correct answer is D .
• Question 1923: An object of mass m and volume v, is totally immersed in a liquid of density p. The tension of a string holding it is Options:
  A) mg
  B) (m + pv)g
  C) (m - pv)g
  D) pvg
  E) [M/m-pv]g
  Show Answer
  The correct answer is C .
• Question 1924:

  

  In the diagram above , if the magnetic field points into the paper and the force on a current - carrying conductor points upwards, what is the direction of the current?

  Options:
  A) Upwards
  B) Downwards
  C) Right
  D) Left
  Show Answer
  The correct answer is D .
• Question 1925: The electromotive force obtained from a simple dynamo may be increased by Options:
  A) increasing the cross-sectional area of the coil
  B) winding the coil on a soft-iron armature so as to decrease the magnetic flux through the coil
  C) increasing the speed of rotation
  D) making the field magnet longer
  E) using low-resistance copper coils
  Show Answer
  The correct answer is C .
• Question 1926:

  

  In the diagram, what is the value of W?

  Options:
  A) 5N
  B) 10N
  C) 15N
  D) 20N
  E) 30N
  Show Answer
  The correct answer is B .
• Question 1927: An observer heard the sound of thunder 5.8s after the lightning flash was seen. How far was he from the source? [Speed of sound in air = 330ms^-1] Options:
  A) 957m
  B) 1914m
  C) 3828m
  D) 8700m
  E) 17400m
  Show Answer
  The correct answer is A .
• Question 1928: A quantity of ice at 10^oC is heated until the temperature of the heating vessel is 90^oC. Which of the following constants is NOT required to determine the quantity of heat supplied to the vessel? Options:
  A) specific heat capacity of ice
  B) specific heat capacity of water
  C) specific latent heat of fusion
  D) specific latent heat of vaporization
  Show Answer
  The correct answer is D .
• Question 1929: A vapour is said to be saturated when Options:
  A) more molecules return to the liquid than the amount that left it
  B) a dynamic equilibrium exists between the molecules of the liquid and the vapour molecules at a given temperature
  C) the vapour pressure is equal to the atmospheric pressure
  D) all molecules are moving with the same speed in all directions at a given temperature
  Show Answer
  The correct answer is B .
• Question 1930:

  Transformers are designed so that energy losses are reduced to a minimum. This is achieved through those process.I. Using a soft iron ore

  II. Laminating the iron core to reduce energy loses due to eddy current

  III. Designing an efficient iron core

  Options:
  A) I & II only
  B) II only
  C) I, II, & III only
  D) III only
  Show Answer
  The correct answer is C .