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 61:

  

  In the figure above, a lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 20m from the load. what minimum force F must be applied at the end of the lever [g = 10ms^-2]

  Options:
  A) 9N
  B) 18N
  C) 20N
  D) 200N
  Show Answer
  The correct answer is D .
• Question 62: What optical instrument can best be constructed with converging lenses of focal lengths 50cm and 5cm? Options:
  A) Compound microscope
  B) Galileo's telescope
  C) Terrestrial telescope
  D) Astronomical telescope
  Show Answer
  The correct answer is D .
• Question 63: Which of the following factors has no effect on the e.m.f. of a primary cell? Options:
  A) temperature
  B) size of the cell
  C) nature of the plate
  D) nature of the electrolyte
  Show Answer
  The correct answer is B .
• Question 64: At what frequency would a 10H inductor have a reactance of 2000Ω? Options:
  A) π/200Hz
  B) π/100Hz
  C) 100/πHz
  D) 100πHz
  Show Answer
  The correct answer is C .
• Question 65:

  

  The frequency of the wave in the diagram above is

  Options:
  A) 0.17 Hz
  B) 0.25 Hz
  C) 1.57 Hz
  D) 1.05 Hz
  Show Answer
  The correct answer is B .
• Question 66: Pure silicon can be converted to a p-type by adding a controlled amount of Options:
  A) trivalent atoms
  B) tetravalent atoms
  C) pentavalent atoms
  D) hexavalent atoms
  Show Answer
  The correct answer is A .
• Question 67:

  Which component of fiber-optic connector has a provision of entry for the fibre along with the fixationto connector housing?

  Options:
  A) coupling device
  B) cable
  C) ferrule
  D) connector housing
  Show Answer
  The correct answer is A .
• Question 68:

  A force, 10N, drags a mass 10kg on a horizontal table with an acceleration of 0.2ms. If the acceleration due to gravity is 10ms^-1, the coefficient of friction between the moving mass and the table is

  Options:
  A) 0.02
  B) 0.08
  C) 0.20
  D) 0.80
  Show Answer
  The correct answer is B .
• Question 69:
  

  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 70:

  In semi-conductor, the carriers of current at room temperature are

  Options:
  A) electrons only
  B) electrons and holes
  C) holes only
  D) electron and ions
  Show Answer
  The correct answer is B .