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 2361: How many grams of water at 17^oC must be added to 42g of ice at 0^oC to melt the ice completely? [specific latent heat of fusion of ice = 3.4 x 10⁵Jkg^-1, specific heat capacity of water = 4200Jkg^-1k^-1] Options:
  A) 200g
  B) 300g
  C) 320g
  D) 400g
  Show Answer
  The correct answer is A .
• Question 2362:

  

  The image above shows an inverted U-tube with the open end, O of one limb below the level, W of water in the tank, in order that water should begin to flow from the tank it is is necessary that

  Options:
  A) The U-tube is completely filled with water and that P should be higher that W
  B) P should be lower than O and W
  C) P should be lower than W and O should reach the botton of the table
  D) The U-tube is completely filled with water and that P should be lower that W
  Show Answer
  The correct answer is B .
• Question 2363: The angle between the direction of the earth's magnetic field and the horizontal is called the Options:
  A) angle of deviation
  B) magnetic declination
  C) magnetic meridian
  D) angle of dip
  Show Answer
  The correct answer is D .
• Question 2364:

  

  The correct position for a fuse in the diagram above is

  Options:
  A) between P and Q
  B) Q
  C) S
  D) P
  Show Answer
  The correct answer is D .
• Question 2365:

  The mass of water vapour in a given volume of air is 0.05g at 20°C, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air.

  Options:
  A) 3.33%
  B) 5.55%
  C) 33.33%
  D) 55.55%
  Show Answer
  The correct answer is C .
• Question 2366:

  A source of sound produces waves in air of wavelength1.65m. If the speed of soundin air is 330ms${}^{-1}$, the period of vibration in air is?

  Options:
  A) 200
  B) 0.005
  C) 0.5
  D) 0.02
  Show Answer
  The correct answer is B .
• Question 2367: A piece of wood is floating on water. The forces acting on the wood are Options:
  A) upthrust and reaction
  B) weight and reaction
  C) weight and upthrust
  D) upthrust and viscousity
  E) weight and viscousity
  Show Answer
  The correct answer is C .
• Question 2368: in a pure semiconductor, the number of electrons in the conduction band is Options:
  A) less than the number of holes in the valence band
  B) equal to the number of holes in the valence band
  C) greater than the number of holes in the valence band
  D) twice the number of holes in the valence band
  Show Answer
  The correct answer is B .
• Question 2369: Two points on a velocity time-graph have coordinates (5s, 10ms^-1) and (20s, 20ms^-1). Calculate the mean acceleration between the two points Options:
  A) 0.67ms^-1
  B) 0.83ms^-1
  C) 1.50ms^-1
  D) 2.00ms^-1
  Show Answer
  The correct answer is A .
• Question 2370: A member of the crew of a SPACESHIP experiences weightlessness in a space when they Options:
  A) Fall freely from the earth’s gravitational field
  B) Is walking on the planet
  C) In between the sun and the earth
  D) Holding anything in space is negative
  Show Answer
  The correct answer is A .