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 831: A body of mass 12kg traveling at 4.2ms^-1 collides with a second body of mass 18kg at rest. Calculate their common velocity if the two bodies coalesce after collision Options:
  A) 1.5 ms^-1
  B) 1.4 ms^-1
  C) 2.1 ms^-1
  D) 1.7 ms^-1
  Show Answer
  The correct answer is D .
• Question 832: Which of the following characteristics of a wave is used in the measurement of the depth of the sea? Options:
  A) diffraction
  B) interference
  C) refraction
  D) reflection
  Show Answer
  The correct answer is D .
• Question 833: The linear expansivity of brass is 2 x 10^-5C^-1. If the volume of a piece of brass is 15.00cm³ at 0⁰C, What is the volume at 100^oC? Options:
  A) 16.03cm³
  B) 16.00cm³
  C) 15.09cm³
  D) 15cm³
  Show Answer
  The correct answer is C .
• Question 834: A bar magnet is most effectively demagnetized by Options:
  A) placing it in a N - 5 position and hitting it with a hammer
  B) subjecting it to an electric current from a battery
  C) bringing its north pole in contact with the north pole of a very strong magnet
  D) heating the magnet
  Show Answer
  The correct answer is A .
• Question 835:

  Calculate the temperature of 6 moles of an ideal gas at a pressure of 7.6 x 10⁶Nm^-2 with a volume of 10^-3m³.

  [R = 8.3jmol^-1K^-1]

  Options:
  A) 201^oC
  B) 126^oC
  C) 153^oC
  D) 185^oC
  Show Answer
  The correct answer is C .
• Question 836: Which of the following materials has an increase in resistance with temperature? Options:
  A) water
  B) metals
  C) wood
  D) electrolyte
  Show Answer
  The correct answer is B .
• Question 837: which of the following materials is a conductor? Options:
  A) Glass
  B) Wax
  C) Sodium
  D) Plastic
  Show Answer
  The correct answer is C .
• Question 838: A transformer is connected to a 250 V a.c. supply. The primary coil has 5000 turns and the secondary voltage is found to be 10 V. What is the number of turns in the secondary coil? Options:
  A) 100
  B) 150
  C) 200
  D) 250
  E) 300
  Show Answer
  The correct answer is C .
• Question 839: Given the progressive wave equation y = 5 sin (2000 πt - 0.4x), calculate wave length Options:
  A) 12.4 m
  B) 15.7 m
  C) 17.5 m
  D) 18.6 m
  Show Answer
  The correct answer is B .
• Question 840:

  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 .