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 81:

  A boat at anchor is rocked by waves whose crest are 100m apart and whose velocity is 25ms^-1. At what interval does the wave crest reach the boat?

  Options:
  A) 2500.00s
  B) 75.00s
  C) 4.00s
  D) 0.25s
  Show Answer
  The correct answer is C .
• Question 82: Isotopes are nuclei which have Options:
  A) the same number of nuetrons and electrons
  B) equal number of electrons and protons
  C) the same atomic number but different number of neutrons
  D) the same number of total particles
  Show Answer
  The correct answer is C .
• Question 83:

  A bar magnet is divided into two pieces, which of the following statement is correct?

  Options:
  A) two new magnets are created
  B) the magnetic field of each separate piece becomes stronger
  C) the electric field is created
  D) the bar magnet is demagnetized
  Show Answer
  The correct answer is A .
• Question 84:

  A certain manufacturer wishes to make an n-type semiconductor. Which materials would he select for doping?

  Options:
  A) boron and antimony
  B) aluminium and antimony
  C) aluminium and indium
  D) arsenic and antimony
  Show Answer
  The correct answer is D .
• Question 85:

  

  A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point?

  Options:
  A) I only
  B) II only
  C) III only
  D) I and II
  E) I,II and III
  Show Answer
  The correct answer is C .
• Question 86:

  

  The diagram above shows forces 4N, 6N, 10N and 8N which act at a point O in the directions indicated. the net horizontal force is

  Options:
  A) 13N
  B) 17N
  C) √3N
  D) 7√3N
  Show Answer
  The correct answer is A .
• Question 87: A stone, Q is thrown with velocity U at an angle of 75^o to the horizontal. Another stone R is thrown with the same velocity U but with an angle of 15^o to the horizontal. The ranges covered by the stones will be Options:
  A) greater for Q
  B) greater for R
  C) the same for Q and R
  D) greater for the heavier of the two stones
  Show Answer
  The correct answer is C .
• Question 88: An electric iron is rated at 1000watts, 250v. The corresponding maximum resistance and accompanying current is Options:
  A) 62.5A, 4.0$\mathrm{\Omega }$
  B) 16.0A, 62.5$\mathrm{\Omega }$
  C) 62.5A, 16.0$\mathrm{\Omega }$
  D) 4.0A, 62.5$\mathrm{\Omega }$
  E) 4.0A, 250$\mathrm{\Omega }$
  Show Answer
  The correct answer is D .
• Question 89:

  

  For a rough inclined plane on which lies a body of weight W, the angle θ in the diagram above becomes the angle of friction if

  Options:
  A) tan θ = coefficient of static friction
  B) cos θ = coefficient of dynamic friction
  C) sin θ = coefficient of sliding friction
  D) sec θ = limiting frictional force
  Show Answer
  The correct answer is A .
• Question 90:

  One of the following is a scalar quantity?

  Options:
  A) weight
  B) momentum
  C) potential energy
  D) displacement
  Show Answer
  The correct answer is C .