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 1021: What happens when a, certain quantity of pure ice is completely changed to water at 0^oC? Options:
  A) latent heat is absorbed, the mass remains constant, and the volume decreases
  B) latent heat is given out, the mass remains constant and the volume decreases
  C) latent heat is given out, the mass increases and the volume remains constant
  D) latent heat is absorbed, the mass decreases and the volume increases
  Show Answer
  The correct answer is B .
• Question 1022: The space between the double glass walls of a thermos flask is evacuated space are silvered. The residual source of heat loss takes place by Options:
  A) convection
  B) radiation from the surface
  C) conduction through the stopper and the glass
  D) conduction across the walls
  Show Answer
  The correct answer is C .
• Question 1023: The eye controls the amount of light reaching the retina by adjusting the Options:
  A) cornea
  B) iris
  C) retina
  D) optic nerve
  Show Answer
  The correct answer is B .
• Question 1024: A body of weight 20N displaces 12N of the liquid in which it is immersed. What is the upthrust of the liquid on the body? Options:
  A) 240N
  B) 32N
  C) 20N
  D) 12N
  E) 8N
  Show Answer
  The correct answer is D .
• Question 1025: If the first position of resonance in a resonance tube is 18.0cm from the open end, the distance from the open end to the next position of resonance will be Options:
  A) 24.0cm
  B) 27.0cm
  C) 36.0cm
  D) 45.0cm
  E) 54.0cm
  Show Answer
  The correct answer is E .
• Question 1026: Which of the following is used in a nuclear reactor to slow down fast moving neutrons? Options:
  A) graphite rods
  B) carbon dioxide gas
  C) liquid sodium metal
  D) concrete shield
  E) boron rods
  Show Answer
  The correct answer is A .
• Question 1027: 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 1028:

  Which of the following is a type of wave that is both mechanical and longitudinal?

  Options:
  A) Water waves
  B) Seismic waves
  C) Sound waves
  D) Light waves
  Show Answer
  The correct answer is C .
• Question 1029: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 1030: A body of mass 4.2kg moving with velocity 10ms^-1 due east, hits a stationary body of mass 2.8kg. If they stick together after collision and move with velocity V due east, calculate the value of V Options:
  A) 3ms^-1
  B) 6ms^-1
  C) 7ms^-1
  D) 15ms^-1
  E) 17ms^-1
  Show Answer
  The correct answer is B .