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 351: An object of mass 100g projected vertically upwards from the ground level has a velocity of 20ms^-1 at a height of 10m. calculate its initial kinetic energy at the ground level.[g = 10ms^-2, neglect air resistance] Options:
  A) 10 J
  B) 20 J
  C) 30 J
  D) 50 J
  Show Answer
  The correct answer is C .
• Question 352: The distance between two successive crests of a wave is 15cm and the velocity 300ms^-1. Calculate the frequency. Options:
  A) 2.0x10²Hz
  B) 4.5x10³Hz
  C) 2.0x10³Hz
  D) 4.5x10²Hz
  Show Answer
  The correct answer is C .
• Question 353: What precaution should a manufacturer take to ensure that energy loss in a transformer is minimized? Options:
  A) the winding of the transformer should be made of high resistance wire
  B) the core should be made of thin sheets of metal
  C) no magnetic material should be used to make the core
  D) the flux linking the primary with the secondary coils should be minimum
  Show Answer
  The correct answer is B .
• Question 354:

  

  The figure above shows a plot of angles of deviation through a glass prism when light is incident at θ degrees on the prism. The incident angle that produces the minimum deviation is

  Options:
  A) 20^o
  B) 18^o
  C) 35^o
  D) 25^o
  Show Answer
  The correct answer is D .
• Question 355: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 356: Which of the following metals will provide the greatest shield against ionizing radiation Options:
  A) Iron
  B) Manganese
  C) Alminium
  D) Lead
  Show Answer
  The correct answer is D .
• Question 357:

  

  A uniform light rod is kept in horizontal equilibrium under the influence of fore forces as shown above, which of the following equations correctly represents the condition of equilibrium for the rod

  Options:
  A) F1 + F2 = F3 + F4
  B) F1 + F2 - F3 + F = 0
  C) (F1 + F2)ab = (F3 + F4)cd
  D) F1a + F2b - F3c - F4d = 0
  Show Answer
  The correct answer is D .
• Question 358: The process whereby a liquid turns spontaneously into vapour is called? Options:
  A) regelation
  B) sublimation
  C) boiling
  D) evaporation
  Show Answer
  The correct answer is D .
• Question 359:

  

  From the diagram above, the measuring accuracy of the micrometer screw gauge is

  Options:
  A) 4.78mm
  B) 4.16mm
  C) 4.66mm
  D) 4.70mm
  Show Answer
  The correct answer is B .
• Question 360: A 220 V, 60 Hz alternating current supply is connected to an inductor of 3.5H. What is the current passing through the inductor? Options:
  A) 0.0167 A
  B) 0.1670 A
  C) 1.6700 A
  D) 16.7000 A
  E) 167.0000 A
  Show Answer
  The correct answer is B .