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 291: A satellite revolving around the earth is kept on its orbit by Options:
  A) Centripetal forces only
  B) Centripetal and frictional forces
  C) Centrifugal forces only
  D) Centripetal and centrifugal forces
  Show Answer
  The correct answer is D .
• Question 292:

  A semiconductor is formed by?

  Options:
  A) co-ordinate bonds
  B) electrovalent bonds
  C) a substance free of bonds
  D) covalent bonds
  Show Answer
  The correct answer is D .
• Question 293: A quantity of water at 0°C is heated to about 30°C. At each degree rise in temperature, its density will Options:
  A) rise steadily
  B) fall steadily
  C) fall then rise
  D) rise then fall
  Show Answer
  The correct answer is D .
• Question 294: Which of the following will reduce the frequency of oscillation of a simple pendulum? Options:
  A) Decreasing the length of the string
  B) Increasing the amplitude of oscillation
  C) Increasing the length of the string
  D) Increasing the mass of the bob
  E) Reducing the mass of the bob.
  Show Answer
  The correct answer is C .
• Question 295: Which of the following statements is incorrect? The sensitivity of a galvanometer which incorporates an optical lever arrangement may be increased by providing Options:
  A) a larger number of turns in the coil
  B) a thinner suspension with a small torsional control
  C) a special alloy permanent magnet which gives a high magnetic flux
  D) all of the above
  E) a light source with a greater intensity
  Show Answer
  The correct answer is D .
• Question 296: Which of the following pairs of musical instruments produce sound due to the vibration of air column? Options:
  A) Bell and piano
  B) Guitar and flute
  C) Trumpet and drum
  D) Trumpet and flute
  E) Violin and organ
  Show Answer
  The correct answer is D .
• Question 297: Vapour is said to be saturated on top of an enclosed liquid if _________ Options:
  A) The rate of condensation is greater than that of vapourization
  B) The rate of condensation is equal to that of vapourization
  C) There is neither condensation nor vaporization of the liquid
  D) The rate of condensation is less that that of vaporization
  Show Answer
  The correct answer is B .
• Question 298: If a body mass 5kg is thrown vertically upwards with velocity u,at what height will the potential energy equal to the kinetic energy? Options:
  A) h =(u)²/g
  B) h = (u)²/4g
  C) h = (2u)²/g
  D) h = (u)²/2g
  Show Answer
  The correct answer is B .
• Question 299: A light of energy 5eV falls on a metal and the electrons with a maximum kinetic energy of 2eV are ejected. The work function of the metal is Options:
  A) 0.4eV
  B) 2.5eV
  C) 3.0eV
  D) 7.0eV
  Show Answer
  The correct answer is C .
• Question 300:

  In a series R-L-C circuit at resonance, the voltages across the resistor and the inductors are 30V and 40V respectively. What is the voltage across the capacitor?

  Options:
  A) 30V
  B) 40V
  C) 50V
  D) 70V
  Show Answer
  The correct answer is B .