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 871: A copper cube weighs 0.25 N in air, 0.17N when completely immersed in paraffin oil and 0.15 N when completely immersed in water.The ratio of upthrust in oil to upthrust in water is Options:
  A) 3 : 5
  B) 4 : 5
  C) 7 : 10
  D) 13 : 10
  Show Answer
  The correct answer is B .
• Question 872: Which of the following phenomena CANNOT be explained by the molecular theory of matter? Options:
  A) Expansion
  B) Conduction
  C) Convection
  D) Radiation
  E) Evaporation
  Show Answer
  The correct answer is D .
• Question 873: Mr. F. Abioye observed his image though a plane mirror, kept a distance way from him at 4.7m in his room at what distance is the image found from Abioye eye? Options:
  A) 9.4m
  B) 7.5m
  C) 5.7m
  D) 6.9m
  Show Answer
  The correct answer is A .
• Question 874:

  A substance has half of 3 min. After 6 min, the count rate was observed to be 400. What was its count rate at zero time?

  Options:
  A) 1600
  B) 1200
  C) 200
  D) 2400
  Show Answer
  The correct answer is A .
• Question 875:

  A bridge made of steel is 600m long. What is the daily variation in its length if the night-time and daytime temperatures are 10^oC and 35^oC respectively. The linear expansivity of steel is 0.000012C^-1

  Options:
  A) 0.18cm
  B) 1.80cm
  C) 18.00cm
  D) 1800cm
  Show Answer
  The correct answer is C .
• Question 876:

  A body moves in SHM between two point 20m on the straight line Joining the points. If the angular speed of the body is 5 rad/s. Calculate its speed when it is 6m from the center of the motion.

  Options:
  A) 20 m/s
  B) 30 m/s
  C) 40 m/s
  D) 50 m/s
  Show Answer
  The correct answer is C .
• Question 877: If relative density of a metal is 19, what will be the mass of 20cm³ of the metal when immersed in water? Options:
  A) 380g
  B) 400g
  C) 360g
  D) 39g
  E) 180g
  Show Answer
  The correct answer is A .
• Question 878: Which of the following waves can propagate through a vacuum? Options:
  A) High velocity sound waves
  B) Ultrasonic waves
  C) Acoustic waves
  D) Infra-red waves
  Show Answer
  The correct answer is D .
• Question 879: The factional force between two bodies Options:
  A) exists only when there is relative motion or tendency for motion
  B) acts so as to oppose the motion
  C) depends on the normal reaction between the two surfaces
  D) is relatively independent of the area in contact
  E) has all of these characteristics
  Show Answer
  The correct answer is E .
• Question 880:

  When a water droplet is placed on a freshly cut piece of wood, it spreads out to form a thin layer because the wood is

  Options:
  A) not at equilibrium with the water
  B) cohesive to water
  C) at equilibrium with the water
  D) adhesive to water
  Show Answer
  The correct answer is D .