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 21:

  

  The current I in the fig above is

  Options:
  A) 4.00A
  B) 1.30A
  C) 0.80A
  D) 0.75A
  Show Answer
  The correct answer is A .
• Question 22:

  

  The figure above shows displacement-time graphs for three different motions. which of the following statements is correct

  Options:
  A) graph 2 corresponds to the highest velocity
  B) graph 1 corresponds to zero gravity
  C) graph 3 corresponds to a particle moving in the negative x direction
  D) graph 2 corresponds to a particle moving in the positive x direction
  Show Answer
  The correct answer is D .
• Question 23: A cube of sides 0.1m hangs freely from a string. What is the upthrust on the cube when totally immersed in water? [density of water is 1000kgm^-2, g = 10ms^-2] Options:
  A) 1000 N
  B) 700 N
  C) 110 N
  D) 10 N
  Show Answer
  The correct answer is D .
• Question 24: Why does a piece of cork float on water? Options:
  A) there is no upthrust on it when completely immersed in water
  B) the upthrust on it when completely immersed in water
  C) the upthrust on it when completely immersed in water is less than its weight in air
  D) its specific gravity is greater than that of water
  E) its specific gravity is the same as that of water
  Show Answer
  The correct answer is E .
• Question 25: Which of the following is a pure semiconductor? Options:
  A) carbon
  B) silicon
  C) transistor
  D) phosphorus
  Show Answer
  The correct answer is B .
• Question 26:

  I. Use a liquid with a high melting point.

  II. use a liquid of high volume expansivity.

  III. use a capillary tube of large diameter. which of the above best describes how the sensitivity of a liquid-in-glass thermometer can be enhanced?

  Options:
  A) I only
  B) II. only
  C) I and II only
  D) II and III only
  Show Answer
  The correct answer is B .
• Question 27: 40m³ of liquid is mixed with 60m³ of another liquid Q. If the density of P and Q are 1.00kgm^-3 and 1.6kgm^-3 respectively, what is the density of the mixture? Options:
  A) 0.05kgm^-3
  B) 1.25kgm^-3
  C) 1.30kgm^-3
  D) 1.36kgm^-3
  Show Answer
  The correct answer is D .
• Question 28: Total internal reflection occurs when light moves from Options:
  A) a dense medium to a less dense medium
  B) air to water
  C) water to glass
  D) a less dense to a dense medium
  Show Answer
  The correct answer is A .
• Question 29:

  The part of the human eye that does similar work as the diaphragm of a camera lens is the

  Options:
  A) Ciliary muscles
  B) Pupil
  C) Iris
  D) Retina
  Show Answer
  The correct answer is C .
• Question 30: A progressive wave is represented by $y=10\text{Sin}(1000\pi t-\frac{\pi x}{34})$ . two layers of the wave separated by 153cm have a phase difference of Options:
  A) 270⁰
  B) 45⁰
  C) 90⁰
  D) 180⁰
  E) No Correct Option
  Show Answer
  The correct answer is E .