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 521:

  A machine gun with a mass of 5kg fires a 50g bullet at a speed of 100 ms${}^{-1}$. The recoil speed of the machine gun is

  Options:
  A) 0.5 ms${}^{-1}$
  B) 1.5 ms${}^{-1}$
  C) 1 ms${}^{-1}$
  D) 2ms${}^{-}1$
  Show Answer
  The correct answer is C .
• Question 522: It is NOT possible to determine exactly and simultaneously the position and momentum of a particle. This statement is known as the Options:
  A) Crompton effect
  B) de Broglie’s laws
  C) Frank-Hertz experimental law
  D) Heisenberg’s uncertainly principle
  E) wave-particle paradox
  Show Answer
  The correct answer is D .
• Question 523: The net charge on the atom is zero because Options:
  A) the electrons and the protons that are charged are in the nucleus
  B) the total charge on the electrons is equal to the total charge on the protons
  C) the neutrons from a shield around the charged protons
  D) the number of electrons in an atom is half the number of protons
  E) A and B above
  Show Answer
  The correct answer is B .
• Question 524:

  A far sighted person cannot see objects that are less than 100cm away. If this person wants to read a book at 25cm, what type and focal length of lens does he need?

  Options:
  A) convex, 20cm
  B) concave, 20cm
  C) convex, 33cm
  D) concave, 33cm
  Show Answer
  The correct answer is A .
• Question 525:

  A rectangular solid black has length 10cm, breadth 5cm and height 2cm. If it lies on a horizontal surface, and has density 100kg/m${}^3$, calculate the pressure it exerts on the surface.

  Options:
  A) 200 N/m${}^2$
  B) 100 N/m${}^2$
  C) 400 N/m${}^2$
  D) 300 N/m${}^2$
  Show Answer
  The correct answer is A .
• Question 526: A heater marked 50W will evaporate 0.005kg of boiling water in 50 seconds. The specific latent heat of vaporization of water in J/kg is Options:
  A) 5.0 x 10⁶
  B) 1.0 x 10⁶
  C) 2.5 x 10⁶
  D) 2.5 x 10⁵
  E) 5.0 x 10⁵
  Show Answer
  The correct answer is E .
• Question 527: A train has an initial velocity of 44ms^-1 and an acceleration of -4ms^-1. Its velocity after 10 seconds is Options:
  A) 2ms^-1
  B) 4ms^-1
  C) 8ms^-1
  D) 12ms^-1
  E) 16ms^-1
  Show Answer
  The correct answer is B .
• Question 528: The length of a displaced pendulum ball which passes its lowest point twice every seconds is [g = 10m^-2] Options:
  A) 0.25 m
  B) 0.45 m
  C) 0.58m
  D) 1.00m
  Show Answer
  The correct answer is A .
• Question 529: The falling of light energy on a metal such that electrons are liberated from the metal is called Options:
  A) electron effect
  B) metal electron effect
  C) metal emission
  D) photoelectric effect
  E) photoemission
  Show Answer
  The correct answer is E .
• Question 530: A boy looks at the image of an object in a plane mirror. He observes two images, a main bright one and the other faint. The observed images result from Options:
  A) reflection only
  B) refraction only
  C) diffraction and interference
  D) reflection and refraction
  E) reflection and diffraction
  Show Answer
  The correct answer is A .