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 1381:

  A piano wire 50 cm long has a total mass of 10 g and its stretched with a tension of 800 N. Find the frequency of the wire when it sounds its third overtone note.

  Options:
  A) 800 Hz
  B) 600 Hz
  C) 400 Hz
  D) 200 Hz
  Show Answer
  The correct answer is A .
• Question 1382:
  

  A block of mass 0.5 kg is suspended at the 40 cm mark of a light metre rule AB that is pivoted at point E, the 90 cm mark, and is kept at equilibrium by a string attached at point D, the 60 cm mark, as shown in the figure above. Find the tension T in the string.

  [Take g = $10ms-2$ ]

  Options:
  A) 16.67N
  B) 15.67N
  C) 14.67N
  D) 18.67N
  Show Answer
  The correct answer is A .
• Question 1383:

  Which of the following instruments may be used to measure relative humidity?

  Options:
  A) Hydrometer
  B) Manometer
  C) Hygrometer
  D) Hypsometer
  Show Answer
  The correct answer is C .
• Question 1384: Light of energy 5eV falls on a metal of work function 3eV and electrons are liberated. The stopping potential is Options:
  A) 1.7V
  B) 2.0V
  C) 8.0V
  D) 15.0V
  Show Answer
  The correct answer is B .
• Question 1385: The electrochemical equivalent of a metal is 1.3 x 10^-7kgC^-1. The mass of the metal which 2.0 x 10⁴C of electricity will deposit from a suitable electrolyte is Options:
  A) 6.5 x 10^-2kg
  B) 2.6 x 10^-2kg
  C) 6.5 x 10^-3kg
  D) 2.6 x 10^-3kg
  Show Answer
  The correct answer is D .
• Question 1386:

  The equation of a wave traveling along the positive x-direction is given by; y = 0.25 x 10${}^{-3}$ sin (500t - 0.025x). Determine the angular velocityof the wave motion.

  Options:
  A) 0.25 x 10${}^{-3}$rads${}^{-1}$
  B) 0.25 x 10${}^{-1}$rads${}^{-1}$
  C) 5.00 x 10${}^2$rads${}^{-1}$
  D) 2.50 x 10${}^3$rads${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 1387: When a charge moves through an electric circuit in the direction of an electric force, it Options:
  A) gains both potential and kinetic energy
  B) gains potential energy and lose kinetic energy
  C) loses potential energy and gains kinetic energy
  D) loses both potential and kinetic energy
  Show Answer
  The correct answer is A .
• Question 1388:

  

  What is the average velocity of the sprinter whose velocity time graph is as shown above

  Options:
  A) 85.0ms^-1
  B) 17.0ms^-1
  C) 8.0ms^-1
  D) 1.7ms^-1
  Show Answer
  The correct answer is C .
• Question 1389: When vibration occurs in air column, the distance between a node and an antinode is equal to Options:
  A) one-quarter of the wavelength
  B) one-hall of the wavelength
  C) the wave length
  D) twice the wavelength
  E) four-times the wavelength
  Show Answer
  The correct answer is A .
• Question 1390:

  

  PQ is a thin rod on a horizontal table, RS is a plane mirror inclined at ${45}^{\circ }C$ to the horizontal as shown above. The image of PQ as seen in the mirror by the eye T is

  Options:
  A) horizontal
  B) parallel to the mirror
  C) at infinity
  D) vertical
  E) highly magnified
  Show Answer
  The correct answer is B .