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 2261: A thin film of liquid is trapped between two glass plates. The force required to pull the plates apart will increase if the Options:
  A) surface tension of the liquid is reduced
  B) perpendicular distance between the plates is increased
  C) area of the liquid surface in contact with the plates is increased
  D) pressure of the air is decreased
  Show Answer
  The correct answer is C .
• Question 2262: A gas at a volume of V₀ in a container at pressure P₀ is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant? Options:
  A) P₀/5
  B) 4P₀/5
  C) P₀
  D) 5P₀
  Show Answer
  The correct answer is D .
• Question 2263: A current carrying conductor experiences a force when placed in a magnetic field because the Options:
  A) conductor is magnetized
  B) magnetic field of the current interacts with external magnetic field
  C) force is due to the motor principle
  D) electric field of the current interacts with the external magnetic field
  Show Answer
  The correct answer is B .
• Question 2264: A metal block of mass 5kg lies on a rough horizontal platform. If a horizontal force of 8N applied to the block through its center of mass just slides the block on the platform, then the coefficient of limiting friction between the block and platform is Options:
  A) 0.16
  B) 0.63
  C) 0.80
  D) 1.60
  E) 2.00
  Show Answer
  The correct answer is A .
• Question 2265: In a resonance tube experiment, if the fundamental frequency of the vibrating air column is 280Hz, the frequency of the third overtone is Options:
  A) 70Hz
  B) 840Hz
  C) 1120Hz
  D) 1960Hz
  Show Answer
  The correct answer is D .
• Question 2266: An object 15cm high is 30cm from pin-hole camera. If the height of the image formed at the back of the camera is 10cm, the image distance is Options:
  A) 20cm
  B) 45cm
  C) 54cm
  D) 63cm
  E) 70cm
  Show Answer
  The correct answer is A .
• Question 2267: The core of an efficient transformer should consist of laminated pieces of metal in order to Options:
  A) increase the heat produced by increasing the eddy current
  B) increase the heat produced by reducing the eddy current
  C) reduce the heat produced by increasing the eddy current
  D) reduce the heat produced by reducing the eddy current
  Show Answer
  The correct answer is D .
• Question 2268: A vapour is said to be saturated when Options:
  A) a dynamic equilibrium exists between liquid molecules and the vapour molecules
  B) a dynamic aquilibrium exists such that more molecules return to the liquid than are living it
  C) the temperature of the vapour varies
  D) the vapour pressure is atmospheric
  Show Answer
  The correct answer is A .
• Question 2269:

  A car of mass 800kg attains a speed of 25m/s in 20secs. The power developed in the engine is

  Options:
  A) 1.25 x 10${}^4$W
  B) 2.50x 10${}^4$W
  C) 1.25 x 10${}^6$W
  D) 2.50 x 10${}^6$W
  Show Answer
  The correct answer is A .
• Question 2270:

  

  What is the reading of the vernier calipers shown above?

  Options:
  A) 1.79cm
  B) 1.73cm
  C) 1.39cm
  D) 1.34cm
  Show Answer
  The correct answer is C .