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 1531: Flourescent tubes produces light by the Options:
  A) excitation of gas molecules
  B) conduction of solar energy
  C) refraction of light by gas molecules
  D) thermal agitation of electron in the tubes
  Show Answer
  The correct answer is A .
• Question 1532: What is the number of neutrons in the Uranium isotope ${}_{92}^{238}X$? Options:
  A) 92
  B) 146
  C) 238
  D) 330
  E) 119
  Show Answer
  The correct answer is B .
• Question 1533:
  

  A block of mass 0.5 kg is suspended at the 40 cm mark of a light metre rule AB that is pivoted at point E, the 90 cm mark, and is kept at equilibrium by a string attached at point D, the 60 cm mark, as shown in the figure above. Find the tension T in the string.

  [Take g = $10ms-2$ ]

  Options:
  A) 16.67N
  B) 15.67N
  C) 14.67N
  D) 18.67N
  Show Answer
  The correct answer is A .
• Question 1534: The sharpness of the boundary of the shadow of an object is determined by the Options:
  A) intensity of light striking the object
  B) rays of light passing through the object
  C) nature of the object
  D) opacity of the object
  Show Answer
  The correct answer is B .
• Question 1535: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 1536: A parallel plate capacitor has a common plate area of 5 x 10^-8m² and plate separation of 2 x 10³m, Assuming free space, What is the capacitance? [$\epsilon$_o = 9.0 X 10^-12C²N^-1m^-2] Options:
  A) 2.25 x 10^-17F
  B) 4.50 x 10^-17F
  C) 2.25 x 10^-16F
  D) 4.50 x 10^-16F
  Show Answer
  The correct answer is C .
• Question 1537:

  The refractive index of a liquid is 1.5. If the velocity of light in vacuum is 3.0 x 10${}^{8}m{s}^{-1}$, the velocity of light in the liquid is

  Options:
  A) 1.5 x 10${}^{8}m{s}^{-1}$
  B) 2.0 x 10${}^{8}m{s}^{-1}$
  C) 3.0 x 10${}^{8}m{s}^{-1}$
  D) 4.5 x 10${}^{8}m{s}^{-1}$
  Show Answer
  The correct answer is B .
• Question 1538: A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are Options:
  A) 0^o and 0^o
  B) 60^o and 60^o
  C) 90^o and 90^o
  D) 90^o and 0^o
  E) 0^o and 90^o
  Show Answer
  The correct answer is D .
• Question 1539: 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 1540: What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100^oC to 80^oC? [the specific latent heat of steam is 2,260,000Jkg^-1, specific heat capacity of water is 4200Jkg^-1K^-1] Options:
  A) 4200J
  B) 2,260,OOOJ
  C) 9,040,000J
  D) 9,380,000J
  Show Answer
  The correct answer is C .