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 101: in a pure semiconductor, the number of electrons in the conduction band is Options:
  A) less than the number of holes in the valence band
  B) equal to the number of holes in the valence band
  C) greater than the number of holes in the valence band
  D) twice the number of holes in the valence band
  Show Answer
  The correct answer is B .
• Question 102: A manometer is an instrument used for measuring Options:
  A) Relative density of liquid
  B) Pressure in liquids and gases
  C) Humidity
  D) Atmospheric pressure
  Show Answer
  The correct answer is B .
• Question 103:

  

  The diagram above shows a lift pump with valves at P and Q. During a downward stroke of the piston

  Options:
  A) both valves are open
  B) P is open while Q is closed
  C) P is closed while Q is open
  D) Both valves are closed
  Show Answer
  The correct answer is B .
• Question 104: A copper wire was subjected to a tensile stress of 7.7 x 10⁷ x 10 Nm^-2. calculate strain of the wire.
  [young modules = 1.1 x 10¹¹ Nm^-2] Options:
  A) 2. 0 x 10^-5
  B) 7.0 x 10^-3
  C) 7.0 x 10^-4
  D) 2.2 x 10^-4
  Show Answer
  The correct answer is C .
• Question 105:

  A tuning fork having a frequency of 312 Hz emits a wave which has a wavelength of 1.10 m. Calculate the velocity of sound

  Options:
  A) 312.0 ms${}^{-1}$
  B) 110.0 ms${}^{-1}$
  C) 343.2 ms${}^{-1}$
  D) 686.4 ms${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 106: A body of mass 4 kg is accelerated from rest by a steady force of 9N. What is its speed when it has travelled a distance of 8m? Options:
  A) 6 ms^-1
  B) 18 ms^-1
  C) 32 ms^-1
  D) 36 ms^-1
  E) 48 ms^-1
  Show Answer
  The correct answer is A .
• Question 107: What is the magnitude of the couple which acts on a rotating circular disc of radius 2m, if a constant tangential force of 2N is responsible for the rotation. Options:
  A) 15Nm
  B) 25Nm
  C) 3Nm
  D) 4Nm
  Show Answer
  The correct answer is D .
• Question 108: In a gas experiment, if the volume of the gas is plotted against the reciprocal of the pressure, the unit of the slope of the resulting curve is Options:
  A) force
  B) temperature
  C) power
  D) work
  Show Answer
  The correct answer is D .
• Question 109: A jet engine develops a thrust of 270Ns when the velocity of the exhaust gases relative to the engine is 300ms^-1. What is the mass of the material ejected per second? Options:
  A) 81.00kg
  B) 9.00kg
  C) 0.90kg
  D) 0.09kg
  Show Answer
  The correct answer is C .
• Question 110: if ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆P_x is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as Options:
  A) ∆x ∆P_x ≥ h
  B) ∆x ∆P_x = 0
  C) ∆x ∆P_x< h
  D) ∆x ∆P_x = ∞
  Show Answer
  The correct answer is A .