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 391: Which of the following units is equivalent to kgms^-1? Options:
  A) Ns^-1
  B) Nms^-1
  C) Ns
  D) Js^-1
  Show Answer
  The correct answer is C .
• Question 392: A pilot records the atmospheric pressure outside its plane as 63cm of Hg while a ground observer records a reading of 75cm of Hg for the atmospheric pressure on the ground. Assuming that the density of the atmosphere is constant, calculate the height of the plane above the ground. (Relative density of Hg = 13.0 and that of air = 0.00013) Options:
  A) 1200m
  B) 6300m
  C) 7500m
  D) 13800m
  Show Answer
  The correct answer is A .
• Question 393: The mass of a stone is 15.0g when completely immersed in water and 10.0g when completely immersed in a liquid of relative density 2.0. The mass of the stone in air is Options:
  A) 5.0g
  B) 12.0g
  C) 20.0g
  D) 25.0g
  Show Answer
  The correct answer is C .
• Question 394: Which of the following radiations has the shortest wavelength? Options:
  A) Infrared rays
  B) Light waves
  C) Microwaves
  D) Ultraviolet rays
  E) X-rays
  Show Answer
  The correct answer is E .
• Question 395: Which of the following statements is NOT true? Options:
  A) A lead-acid accumulator can deliver a large current because of its very large internal resistance.
  B) A secondary cell can be recharged.
  C) As a lead-acid accumulator is being charged, the density of the acid in it increases.
  D) The chemical action in a primary cell is irreversible.
  E) The conventional current in a circuit rlows from the positive to the negative terminal of the battery.
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  The correct answer is A .
• Question 396: If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours a lamp required 1A on a 200v line? Options:
  A) 24k
  B) 55k
  C) 40k
  D) 26k
  E) 32k
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  The correct answer is A .
• Question 397: If a source of sound is moving, a stationary listener will hear a sound of different frequency. This is called Options:
  A) Doppler effect
  B) Resonance
  C) Ultra sound
  D) Diffraction of sound
  E) Rarefaction
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  The correct answer is A .
• Question 398: A certain far - sighted person cannot see object that are closer to the eye than 50 cm clearly. Determine the power of the converging lens which will enable him to see at 25 cm Options:
  A) 0.06 D
  B) 0.02 D
  C) 0.03 D
  D) 0.04 D
  E) no option is correct
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  The correct answer is E .
• Question 399: Find the work done in moving a 2 C charge between two points X and Y in an electric field if the potential difference is 100 volts Options:
  A) 50J
  B) 100J
  C) 200J
  D) 400J
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  The correct answer is C .
• Question 400: Which of the following eye defects can be corrected using a cylindrical lens. Options:
  A) myopia
  B) Astigmatism
  C) Presbyopia
  D) Chromatic abiration
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  The correct answer is B .