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 81: the ray which causes gas molecules to glow is known as Options:
  A) cathode ray
  B) anode ray
  C) molecular ray
  D) gamma ray
  Show Answer
  The correct answer is A .
• Question 82: A machine whose efficiency is 75% is used to lift a load of 1000N. Calculate the effort put in to the machine if it has a Velocity ratio of 4. Options:
  A) 343.32N
  B) 233.33N
  C) 333.33N
  D) 334.33N
  Show Answer
  The correct answer is C .
• Question 83: The length of mercury thread when it is at 0^oC, 100^oC and at an unknown temperature $\theta$ is 25mm, 225mm and 175mm respectively. The value of $\theta$ is Options:
  A) 85.0^oC
  B) 80.0^oC
  C) 75.0^oC
  D) 70.0^oC
  Show Answer
  The correct answer is C .
• Question 84:

  

  An electrical circuit is connected up as shown above, which of the following is correct about the value of current flowing through the 1 ohm resistance?

  Options:
  A) 12/13A
  B) 13/12A
  C) 1/3A
  D) 3A
  E) 12/7A
  Show Answer
  The correct answer is D .
• Question 85:

  The time rate of loss of heat by a body is proportional to the

  Options:
  A) temperature of its surroundings
  B) temperature of the body
  C) difference in temperature between the body and its surroundings
  D) ratio of the temperature of the body to that of its surroundings
  Show Answer
  The correct answer is C .
• Question 86: A particle starts from rest and moves with a constant acceleration of 0.5ms^-2. The distance covered by the particle in 10s is Options:
  A) 2.5m
  B) 5.0m
  C) 25.0m
  D) 50.0m
  Show Answer
  The correct answer is C .
• Question 87:

  The resultant of two forces 12N and 5N is 13N. What is the angle between the two forces?

  Options:
  A) 0^o
  B) 45^o
  C) 90^o
  D) 180^o
  Show Answer
  The correct answer is C .
• Question 88: On top of a spiral spring of the force constant 500Nm^-1 is placed a mass of 5 x 10^-3 kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the mass is projected Options:
  A) 8 m
  B) 4 m
  C) 2 m
  D) 1 m
  Show Answer
  The correct answer is C .
• Question 89:

  Which of the following liquid is a poor conductor of electricity?

  Options:
  A) Distilled water
  B) Tap water
  C) Sea water
  D) Drinking water
  Show Answer
  The correct answer is A .
• Question 90: The kinetic theory of photoelectron liberated from a metallic surface depends on the Options:
  A) intensity of the incident radiation
  B) time duration of the incident radiation
  C) temperature of the incident radiation
  D) frequency of the incident radiation
  Show Answer
  The correct answer is D .