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 931:

  

  In the circuit above, three resistors, 2Ω, 4Ω and 12Ω are connected in parallel and a 12V battery is connected across the combination. The current flowing through the 12Ω resistors is

  Options:
  A) 14.4 A
  B) 1.0 A
  C) 3.2 A
  D) 9.6 A
  Show Answer
  The correct answer is B .
• Question 932: When vibration occurs in air column, the distance between a node and an antinode is equal to Options:
  A) one-quarter of the wavelength
  B) one-hall of the wavelength
  C) the wave length
  D) twice the wavelength
  E) four-times the wavelength
  Show Answer
  The correct answer is A .
• Question 933: A boy on looking into a mirror observed that his face appeared to have grown bigger. The boy must have been looking at a Options:
  A) convex mirror with his face at the focus
  B) concave mirror with his face between the focus and the mirror
  C) concave mirror with his face at the focus
  D) convex mirror with his face between the focus and the mirror
  Show Answer
  The correct answer is B .
• Question 934: In a projection lantern of focal length f, the object distance u, is such that Options:
  A) u > 2f > f
  B) u < f < 2f
  C) u = f < 2f
  D) f < u < 2f
  Show Answer
  The correct answer is D .
• Question 935: An electric iron is rated at 1000watts, 250v. The corresponding maximum resistance and accompanying current is Options:
  A) 62.5A, 4.0$\mathrm{\Omega }$
  B) 16.0A, 62.5$\mathrm{\Omega }$
  C) 62.5A, 16.0$\mathrm{\Omega }$
  D) 4.0A, 62.5$\mathrm{\Omega }$
  E) 4.0A, 250$\mathrm{\Omega }$
  Show Answer
  The correct answer is D .
• Question 936: A piece of wood floats inside water at room temperature with a fraction of it above the liquid surface. As the temperature of the water is raised, the part of the wood above the liquid will Options:
  A) decrease because the density of water decreases with temperature
  B) increase because the density of water decreases with temperature
  C) decreases because the density of water increases with water temperature
  D) increase because the density of water increases with temperature
  Show Answer
  The correct answer is A .
• Question 937: A structural engineer stood on a top of a building releasing a light and heavy object to the ground which of the following statement is true?(Neglect Air Resistance) Options:
  A) Bothe light and heavy subject reach the ground at the same time
  B) he light object get to the ground first before the heavy object
  C) he heavy object to the ground first before the light object
  D) None get to the ground first
  Show Answer
  The correct answer is A .
• Question 938: the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is Options:
  A) 3
  B) 1.5
  C) 1.32
  D) 1
  E) 0.67
  Show Answer
  The correct answer is E .
• Question 939: If the load at the end of a sonometer wire is immersed in a bucket of water, the original fundamental frequency of the wire could be restored by Options:
  A) decrease the length of the wire
  B) increasing the length of the wire
  C) increasing the mass per unit length of the wire
  D) changing the temperature of the wire
  Show Answer
  The correct answer is B .
• Question 940: If the load at the end of a sonometer wire is immersed in a bucket of water, the original fundamental frequency of the wire could be restored by Options:
  A) decrease the length of the wire
  B) increasing the length of the wire
  C) increasing the mass per unit length of the wire
  D) changing the temperature of the wire
  Show Answer
  The correct answer is B .