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 871: Which of the following is true of sounds? Options:
  A) sound travels faster in air at 20^oC than at 30^oC
  B) the frequency of a given sound wave changes when it crosses the boundary seperating two media
  C) the wavelength of a given sound wave in air decreases as the temperature increases
  D) sound waves cannot be reflected
  Show Answer
  The correct answer is C .
• Question 872:

  A simple pendulum, has a period of 5.77 seconds. When the pendulum is shortened by 3 m, the period is 4.60 seconds. Calculate the new length of the pendulum

  Options:
  A) 5.23 m
  B) 6.42 m
  C) 4.87 m
  D) 7.26 m
  Show Answer
  The correct answer is A .
• Question 873: Shadows and eclipse result from the Options:
  A) Reflection of light
  B) Rectilinear propagation of light
  C) Diffraction of light
  D) Refraction of light
  Show Answer
  The correct answer is B .
• Question 874: A uniform meter rule weighing 0.5N is to be pivoted on a knife-edge at the 30cm-mark. where will a force of 2N be placed from the pivot to balance the meter rule? Options:
  A) 95cm
  B) 25cm
  C) 20cm
  D) 5cm
  Show Answer
  The correct answer is B .
• Question 875:

  

  The diagram above shows two capacitors P and Q of capacitance 2μF and 4μF respectively connected to a d.c source. The ratio of energy stored in P to Q is

  Options:
  A) 4:1
  B) 2:1
  C) 1:4
  D) 1:2
  Show Answer
  The correct answer is D .
• Question 876:

  

  In the diagram above, the direction of the force between N and S in the magnetic field is

  Options:
  A) MP
  B) SN
  C) NS
  D) PM
  Show Answer
  The correct answer is C .
• Question 877:

  The point at which the molecules of a loaded wire begin to slide across each other resulting in a rapid increase in extension is

  Options:
  A) yield point
  B) proportionality point
  C) deformation point
  D) elastic point
  Show Answer
  The correct answer is A .
• Question 878:

  If a light wave has a wavelength of 500nm in air what is the frequency of the wave?

  [c = 3 x 10⁸ ms^-1]

  Options:
  A) 3.0 x 10¹⁴ Hz
  B) 6.0 x 10¹⁴ Hz
  C) 6.0 x 10¹² Hz
  D) 2.5 x 10¹⁴ Hz
  Show Answer
  The correct answer is B .
• Question 879:

  

  The diagram above shows the force (F) acting on an object through a distance (x). The work done on this object is expressed as

  Options:
  A) Fx J
  B) ^Fx/₂ J
  C) Fx² J
  D) ^F/_x J
  Show Answer
  The correct answer is B .
• Question 880: Which of the following is common to evaporation and boiling? They Options:
  A) take place at any temperature
  B) are surface phenomena
  C) involve change of state
  D) take place at a definite pressure
  Show Answer
  The correct answer is C .