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 521:

  Which of the following statements on the use of X-rays is incorrect? X-rays are used

  Options:
  A) In a hospital to obtain photographs of tissues and bones in the body
  B) For the treatment of malignant growths like cancer cells
  C) In detecting fingerprints
  D) To reveal hidden flaws in metal castings and welded joints work of art
  Show Answer
  The correct answer is C .
• Question 522: An electric charge could be transmitted through Options:
  A) wood, rubber and stone
  B) paper, clay and plastic
  C) glass, acid and cloth
  D) The human body, water and metals
  E) all of the above
  Show Answer
  The correct answer is D .
• Question 523: The note produced by a stretched string has a fundamental frequency of 400Hz. If the length of the string is doubled while the tension in the string is increased by a factor of 4, the frequency is Options:
  A) 200Hz
  B) 400Hz
  C) 800Hz
  D) 1600Hz
  Show Answer
  The correct answer is B .
• Question 524: Water does not drop through an open umbrella of silk materials unless the inside of the umbrella is touched. This is due to Options:
  A) capilarity
  B) osmotic pressure
  C) viscosity
  D) surface tension
  Show Answer
  The correct answer is D .
• Question 525:

  The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 180Hz?

  Options:
  A) 4
  B) 3
  C) 2
  D) 1
  Show Answer
  The correct answer is B .
• Question 526: If the total force acting on a particle is zero, the linear momentum will Options:
  A) Increase
  B) Decrease
  C) Be Constant
  D) Increase then decrease
  Show Answer
  The correct answer is C .
• Question 527: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 528: 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 529: A positive charged rod X is brought near as uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that y has Options:
  A) no charge and a zero potential
  B) a positive charge and zero potential
  C) a negative charge and positive potential
  D) a negative charge and a negative potential
  Show Answer
  The correct answer is D .
• Question 530:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .