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 1911:

  The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles's law is a?

  Options:
  A) hyperbola
  B) parabola
  C) curve
  D) straight line
  Show Answer
  The correct answer is D .
• Question 1912: All the heat generated in a 5 ohms resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid? Options:
  A) 120J
  B) 60Jg^-1
  C) 120Jg^-1
  D) 1500J
  E) 1500Jg^-1
  Show Answer
  The correct answer is C .
• Question 1913: The echo of a sounder from the bottom of an ocean is heard 2.5 seconds later. If the speed of sound in water is 1,400ms^-1, the depth of the ocean is Options:
  A) 1,750m
  B) 3,500m
  C) 1,400m
  D) 2,800m
  E) 2,100m
  Show Answer
  The correct answer is A .
• Question 1914:

  A transverse wave is applied to a string whose mass per unit length is 3 x 10^-2kgm^-1. If the string is under a tension 12N, the speed of the propagation of the wave is

  Options:
  A) 5 ms^-1
  B) 20 ms^-1
  C) 30 ms^-1
  D) 40 ms^-1
  Show Answer
  The correct answer is B .
• Question 1915:

  ${}_{92}^{235}U{+}_0^{1}n{\to }_{56}^{144}Ba{+}_{36}^{90}Kr+2X$

  In the reaction above, X is

  Options:
  A) electron
  B) proton
  C) neutrino
  D) neutron
  Show Answer
  The correct answer is D .
• Question 1916: Which of the following correctly describes the energy changes in the generation of light by a hydroelectric power station? Options:
  A) Electrical $\to$ mechanical $\to$ potential
  B) potential $\to$mechanical $\to$electrical $\to$ light
  C) mechanical $\to$ sound $\to$ electrical $\to$ light
  D) kinetic $\to$ mechanical $\to$ electrical $\to$light
  Show Answer
  The correct answer is B .
• Question 1917: Which of the following elements is the best absorber of X-rays? Options:
  A) hydrogen
  B) oxygen
  C) calcium
  D) copper
  E) lead
  Show Answer
  The correct answer is E .
• Question 1918: The temperature at which the water vapour present in the air is just sufficient to saturate air is Options:
  A) Boiling point
  B) Ice point
  C) Saturation point
  D) Dew point
  Show Answer
  The correct answer is D .
• Question 1919: A bar magnet is most effectively demagnetized by Options:
  A) placing it in a N - 5 position and hitting it with a hammer
  B) subjecting it to an electric current from a battery
  C) bringing its north pole in contact with the north pole of a very strong magnet
  D) heating the magnet
  Show Answer
  The correct answer is A .
• Question 1920: In which of the following material media will sound travel fastest? Options:
  A) oil
  B) metal
  C) gas
  D) water
  Show Answer
  The correct answer is B .