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 701: In a large telecommunications auditorium, perforated absorbent materials are used to line the ceiling so as to Options:
  A) Increase the reverberation of sound in the hall
  B) increase the amount of echo in the hall
  C) reduce the hight of the ceiling from the floor
  D) reduce the reverberation of sound in the hall
  Show Answer
  The correct answer is D .
• Question 702:

  A convex mirror is used as a driving mirror because

  I. its image is erect

  II. It has a large field of view

  III. It has a long focal length

  Identify the CORRECT statement(s)

  Options:
  A) I and III only
  B) I and II only
  C) II and IIII only
  D) I, II and III only
  Show Answer
  The correct answer is B .
• Question 703: A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is Options:
  A) 3m
  B) 5m
  C) 6m
  D) 10m
  Show Answer
  The correct answer is C .
• Question 704: A good electric cell should have the following except Options:
  A) A minimum of polarization effect
  B) A long life
  C) A cheap and safe electrolytes
  D) Cost and dangerous of the cell
  Show Answer
  The correct answer is D .
• Question 705: The difference between X-rays and gamma rays is that Options:
  A) x-rays are more penetrating than gamma rays
  B) x-rays are electromagnetic radiations while gamma rays are negatively charged radiation
  C) x-rays have higher frequencies than gamma rays
  D) x-rays arise from energy changes in the electronic structure of atoms while gamma rays come from the nucleus
  Show Answer
  The correct answer is D .
• Question 706:

  The linear expansivityof brass is 2 x 10${}^{-5}$ ${}^o{C}^{-1}$. If the volume of piece of brass is 10cm${}^3$ at 0${}^o$C. What will be its volume at 100${}^o$C?

  Options:
  A) 10.06cm${}^3$
  B) 10.04 cm${}^3$
  C) 10.02 cm${}^3$
  D) 10.20 cm${}^3$
  Show Answer
  The correct answer is A .
• Question 707: One of the properties of the earth's magnetic field is that the Options:
  A) north pole lies in the northern hemisphere
  B) geographic and magnetic meridians coincide
  C) earth's magnetic flux is entirely horizontal at a place where the magnetic dip is zero
  D) earth's magnetic flux is entirely vertical at a place where the magnetic dip is zero
  Show Answer
  The correct answer is C .
• Question 708:

  

  For a rough inclined plane on which lies a body of weight W, the angle θ in the diagram above becomes the angle of friction if

  Options:
  A) tan θ = coefficient of static friction
  B) cos θ = coefficient of dynamic friction
  C) sin θ = coefficient of sliding friction
  D) sec θ = limiting frictional force
  Show Answer
  The correct answer is A .
• Question 709:

  How much net work is required to accelerate a 1200 kg car from 10$m{s}^{-1}$ to 15$m{s}^{-1}$

  Options:
  A) 1.95×${10}^{5}j$
  B) 1.35×${10}^{4}j$
  C) 7.5×${10}^{4}j$
  D) 6.0×${10}^{4}j$
  Show Answer
  The correct answer is C .
• Question 710: A heating coil rated at 100W is used to boil off 0.5kg of boiling water. The time taken to boil off the water is [specific latent heat of vaporization of water = 2.3 x 10⁶Jkg^-1] Options:
  A) 1.15 x 10⁹ s
  B) 1.15 x 10⁷ s
  C) 1.15 x 10⁵ s
  D) 1.15 x 10⁴ s
  Show Answer
  The correct answer is D .