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 41: blowing air over a liquid aids evaporation by Options:
  A) increasing its surface area
  B) decreasing its vapour pressure
  C) increasing its temperature
  D) decreasing its density
  Show Answer
  The correct answer is A .
• Question 42:

  An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?

  Options:
  A) 3 days
  B) 2 days
  C) 1 day
  D) 4 days
  Show Answer
  The correct answer is B .
• Question 43: A brass rod is 2m long at a certain temperature. What is the length for a temperature rise of 100K, if the expansivity of brass is 18 x 10^-6K^-1? Options:
  A) 2.0036m
  B) 2.0018cm
  C) 2.1800
  D) 2.0360m
  Show Answer
  The correct answer is A .
• Question 44:

  Which of the following is NOT an example of elementary modern physics?

  Options:
  A) Classical mechanics
  B) Quantum mechanics
  C) Special relativity
  D) Nuclear physics
  Show Answer
  The correct answer is A .
• Question 45: 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 46: During summer, the balance wheel of a clock expands.what effect does this have on the accuracy of the clock? Options:
  A) the clock gians time
  B) the accuracy of the clock is not affected
  C) the clock losses time
  D) the clock stops working
  Show Answer
  The correct answer is C .
• Question 47: Satellite communication network makes use of? Options:
  A) visible light
  B) sound wave
  C) radio wave
  D) infra-red wave
  Show Answer
  The correct answer is C .
• Question 48: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 49:

  Which of the following readings cannot be determined with a meter rule?

  Options:
  A) 2.56cm
  B) 2.25cm
  C) 2.50cm
  D) 2.05cm
  Show Answer
  The correct answer is A .
• Question 50: A dynamo primarily converts Options:
  A) Mechanical energy into electrical energy
  B) Electrical energy into kinetic energy
  C) Potential energy into kinetic energy
  D) Kinetic energy into potential energy
  Show Answer
  The correct answer is A .