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 371: Which of the following statements is correct? Silvered walls of a vacuum flask are used to prevent Options:
  A) heat loss due to conduction
  B) vacuum loss
  C) heat entry into the inner flask due to convection
  D) heat loss due to radiation
  E) heat loss due to convection
  Show Answer
  The correct answer is D .
• Question 372: If the normal atmospheric pressure in a laboratory supports a column of mercury 0.76m high and the relative density of mercury is 13.8, then the height of water column which atmospheric pressure will support in the same laboratory at the same time is Options:
  A) 0m
  B) 10m
  C) 13m
  D) 14m
  E) 18m
  Show Answer
  The correct answer is B .
• Question 373: A charge 50 µc has electric field strength of 360 NC^-1 at a certain point. The electric field strength due to another charge 120 µc kept at the same distance apart and in the same medium is? Options:
  A) 864 NC^-1
  B) 150 NC^-1
  C) 144 NC^-1
  D) 18 NC^-1
  Show Answer
  The correct answer is B .
• Question 374:

  

  The diagram above shows a closed side 0.5m in a uniform electric field E in the direction shown by the arrows. What is the flux Φ for the box?

  Options:
  A) 0.5 E
  B) 2.0 E
  C) 0.2 E
  D) 0.0 E
  Show Answer
  The correct answer is D .
• Question 375: The spectrum of white light consists of coloured lights arranged in the following order Options:
  A) blue, red, green, yellow, indigo, violet, orange
  B) red, orange, yellow, green, blue, indigo, violet
  C) red, orange, yellow, indigo, green, blue, violet
  D) indigo, green, blue, violet, yellow, red, orange
  E) yellow, blue, green, violet, orange, indigo, red
  Show Answer
  The correct answer is B .
• Question 376:

  The number of holes in an intrinsic semiconductor

  Options:
  A) is not equal to the number of free electrons
  B) is greater than the number of free electrons
  C) is equal to the number of free electrons
  D) is less than the number of free electrons
  Show Answer
  The correct answer is C .
• Question 377: A wave disturbance travelling in air enters a medium in which its velocity is less than that in air. Which of the following statements is true about the wave medium? Options:
  A) both the frequency of the wave and the wavelength are decreased
  B) the frequency of the wave is decreased while the wavelength is increased
  C) the frequency of the wave is unaltered while the wavelength is decreased
  D) the frequency of the wave is decreased while the wavelength is unaltered
  Show Answer
  The correct answer is C .
• Question 378: The resultant force of a couple is ………? Options:
  A) Infinity
  B) Zero
  C) One
  D) Half
  Show Answer
  The correct answer is B .
• Question 379:

  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 .
• Question 380: The unit of quantity of electricity is called Options:
  A) the ampere
  B) the volts
  C) the coulomb
  D) the ammeter
  E) electromotive force
  Show Answer
  The correct answer is C .