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 1851:

  Which of the following conditions are necessary and sufficient for total internal reflection to take place at the boundary between two optical media?

  I. Light is passing from optical denser medium to optically less dense medium

  II. Light is passing from optically less dense medium to optically denser medium

  III. Angle of incidence is greater than a certain critical value

  IV. Angle of incidence is lesser than a certain critical value

  Options:
  A) I and II only
  B) II only III only
  C) III and IV only
  D) I and III only
  Show Answer
  The correct answer is D .
• Question 1852: If the distance from a point source of sound is doubled, by what factor does the intensity decrease? Options:
  A) 4.00
  B) 2.00
  C) 0.50
  D) 0.25
  Show Answer
  The correct answer is A .
• Question 1853: Which of the following is a scalar quantity? Options:
  A) Tension
  B) Weight
  C) Impulse
  D) Mass
  Show Answer
  The correct answer is D .
• Question 1854:

  Efficiency of conduction in liquids and gases compared to solids is

  Options:
  A) less efficient than solid
  B) more efficient than solids
  C) equally efficient to solids
  D) efficiently may vary
  Show Answer
  The correct answer is A .
• Question 1855: A circuit has an area of 0.4m² and consists of 50 loops of wire. If the loops are twisted and allowed to rotate at a constant angular velocity of 10 rad s^-1 in a uniform magnetic field of 0.4T, the amplitude of the induced voltage is Options:
  A) 8V
  B) 16V
  C) 20V
  D) 80V
  Show Answer
  The correct answer is D .
• Question 1856:

  The differences observed in solids, liquids and gases may be accounted for by

  Options:
  A) their relative masses
  B) their melting points
  C) the spacing and forces acting between the molecules
  D) the different molecules in each of them
  Show Answer
  The correct answer is C .
• Question 1857: Which of the following is NOT a force? Options:
  A) Friction
  B) Tension
  C) Upthrust
  D) Weight
  E) Impulse
  Show Answer
  The correct answer is E .
• Question 1858: A man walks 1km due east and then 1km due north. His displacement is Options:
  A) 1 km N15^oE
  B) 1 km N30^oE
  C) $\sqrt{2}$km N 45^oE
  D) $\sqrt{2}$km N 60^oE
  E) 2km N 75^oE
  Show Answer
  The correct answer is C .
• Question 1859: Calculate the mass of the copper deposited during electrolysis when a current of 4A passes through a copper salt for 2 hours. [Ece of Copper z=3.3x10^-7kgC^-1] Options:
  A) 2.9x10⁵kg
  B) 9.5x10^-7kg
  C) 9.5x10^-3kg
  D) 2.9x10⁴kg
  Show Answer
  The correct answer is C .
• Question 1860: If the refractive index of a medium in air is 2.0, what is the critical angle for this medium? Options:
  A) 30^o
  B) 42^o
  C) 45^o
  D) 50^o
  Show Answer
  The correct answer is A .