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 731: A projectile attains its maximum height when the angle of projection is Options:
  A) 30°
  B) 45°
  C) 60°
  D) 75°
  E) 90°
  Show Answer
  The correct answer is B .
• Question 732:

  Aluminium is sometimes used as the leaf of an electroscope because it

  Options:
  A) is a light material
  B) is a good conductor
  C) is a good insulator
  D) can be converted into thin sheets
  Show Answer
  The correct answer is D .
• Question 733: The length of mercury thread when it is at 0^oC, 100^oC and at an unknown temperature $\theta$ is 25mm, 225mm and 175mm respectively. The value of $\theta$ is Options:
  A) 85.0^oC
  B) 80.0^oC
  C) 75.0^oC
  D) 70.0^oC
  Show Answer
  The correct answer is C .
• Question 734: A coin is placed at the bottom of a cube of glass tern thick. If the refractive index of the glass is $\mu$, how high does the coin appear to be raised to an observer looking perpendicularly into the glass? Options:
  A) $\frac{1}{t-\mu }$
  B) $\frac{t(\mu -I)}{\mu }$
  C) t (1 + $\frac{1}{\mu }$)
  D) -$\mu$
  E) $\mu$t
  Show Answer
  The correct answer is B .
• Question 735:

  What effort will a machine of efficiency 90% apply to a load of 180N if its efforts arm is twice as long as its load arm?

  Options:
  A) 100N
  B) 90N
  C) 80N
  D) 120N
  Show Answer
  The correct answer is A .
• Question 736: Which of the following is an essential physical property of the wires used for making fuses? Options:
  A) low density
  B) high thermal conductivity
  C) low electrical resistivity
  D) low melting point
  Show Answer
  The correct answer is D .
• Question 737: The distance xm travelled by a particle in time t seconds is described by the equation x = 10 + 12t², Find the average speed of the particle between the time interval t = 2s and t = 5s Options:
  A) 60 ms^-1
  B) 72 ms^-1
  C) 84 ms^-1
  D) 108 ms^-1
  Show Answer
  The correct answer is B .
• Question 738: An inclined plane of angle $\theta$, acting as a simple machine, has a velocity ratio Options:
  A) sin$\theta$
  B) $\frac{1}{\text{sin}\theta }$
  C) cos$\theta$
  D) $\frac{1}{\text{cos}\theta }$
  E) sin$\theta cos\theta$
  Show Answer
  The correct answer is B .
• Question 739: If the angle between two vector P and Q is O^o, the vectors are said to Options:
  A) intersect at the angle 45^o
  B) intersect at the angle 60^o
  C) be parallel
  D) be perpendicular
  Show Answer
  The correct answer is C .
• Question 740: 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.
  Show Answer
  The correct answer is A .