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 791:

  

  What is the average velocity of the sprinter whose velocity time graph is as shown above

  Options:
  A) 85.0ms^-1
  B) 17.0ms^-1
  C) 8.0ms^-1
  D) 1.7ms^-1
  Show Answer
  The correct answer is C .
• Question 792: An object placed on the principle axis of a convex lens of focal length 10m produces a real image of double magnification. The image distance from the lens is Options:
  A) 30cm
  B) 25cm
  C) 20cm
  D) 15cm
  E) 10cm
  Show Answer
  The correct answer is A .
• Question 793:

  A source of sound produces waves in air of wavelength1.65m. If the speed of soundin air is 330ms${}^{-1}$, the period of vibration in air is?

  Options:
  A) 200
  B) 0.005
  C) 0.5
  D) 0.02
  Show Answer
  The correct answer is B .
• Question 794: The following are some units i. Ns ii. Mm iii. Nm^-2 iv. J^oK^-1. What are the units of latent heat? Options:
  A) i
  B) ii
  C) iii
  D) iv
  Show Answer
  The correct answer is D .
• Question 795: When two mirrors are placed at an angle of 900 to each other, how many images will be formed when an object is placed in front of the mirrors Options:
  A) 5
  B) 4
  C) 3
  D) 2
  Show Answer
  The correct answer is C .
• Question 796: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 797: which of the following is NOT correct? i. the pitch of a sound note depends on the frequency of vibrations. ii. the intensity of a sound note is proportional to the amplitude of vibrations. iii. beats are produced by two sources of sound because one wave is travelling faster than the other. iv. when two sources of sound of frequencies 500Hz and 502Hz are sounded together, a beat frequency of 2Hz is observed. v. the first harmonic of a tone have double the frequency of the fundamental note. Options:
  A) i and ii
  B) ii and iii
  C) i and iii
  D) iii and iv
  E) iv and v
  Show Answer
  The correct answer is A .
• Question 798: When a metal is heated to a high temperature, electrons are emitted from its surface. The process is known as Options:
  A) photoelectric effect
  B) thermionic emission
  C) field emission
  D) secondary emission
  E) radioactive emission
  Show Answer
  The correct answer is B .
• Question 799: 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 800: A man walks 1km due east and then 1km due north. His displacement is Options:
  A) 1 km N15^oE
  B) 1 km N30^oE
  C) $\sqrt{2}$km N 45^oE
  D) $\sqrt{2}$km N 60^oE
  E) 2km N 75^oE
  Show Answer
  The correct answer is C .