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 2451: The specific latent heat of vaporization of a substance is always Options:
  A) less than its specific latent heat of fusion
  B) greater than its specific heat of fusion
  C) equal to its specific latent heat of fusion
  D) all of the above depending on the nature of the substance
  E) none of the above
  Show Answer
  The correct answer is B .
• Question 2452: Two divers G and H are at depths 20m and 40m respectively below the water surface in a lake. The pressure on G is P₁ while the pressure on H is P₂. If the atmospheric pressure is equivalent to 10m of water, then the value of $\frac{p_2}{p_1}$ is Options:
  A) 0.50
  B) 0.60
  C) 1.67
  D) 2.00
  E) 3.0
  Show Answer
  The correct answer is D .
• Question 2453: If relative density of a metal is 19, what will be the mass of 20cm³ of the metal when immersed in water? Options:
  A) 380g
  B) 400g
  C) 360g
  D) 39g
  E) 180g
  Show Answer
  The correct answer is A .
• Question 2454: The displacement d produced in a glass block of thickness t and refractive index n when an object is viewed through it is Options:
  A) t – n
  B) t (1 + 1/n)
  C) t (1-1/n)
  D) t (1/n - 1)
  Show Answer
  The correct answer is C .
• Question 2455:

  The lower fixed part of a faulty thermometer reads 2°C while the upper fixed point is 100°C.

  What is the true temperature when the thermometer reads 51°C?

  Options:
  A) 52°C
  B) 50°C
  C) 49°C
  D) 46°C
  Show Answer
  The correct answer is B .
• Question 2456: The difference between sound waves and light waves is that sound waves Options:
  A) are transverse while light waves are longitudinal
  B) require a medium to travel while light waves does not
  C) can be diffracted but light waves cannot
  D) cannot be reflected but light waves can
  Show Answer
  The correct answer is B .
• Question 2457: The angle of deviation of light of various colours passing through a triangular prism increases in the order Options:
  A) red → green → blue
  B) green → violet → blue
  C) blue → red → green
  D) blue → green → red
  Show Answer
  The correct answer is A .
• Question 2458:

  0.5kg of water at 10ºC is completely converted to ice at 0ºC by extracting (88000) of heat from it. If the specific heat capacity of water is 4200jkg${}^1$ Cº. Calculate the specific latent heat of fusion of ice.

  Options:
  A) 9.0kjkg${}^{-1}$
  B) 84.0kjkg${}^{-1}$
  C) 134.0kjkg${}^{-1}$
  D) 168.0kjkg${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 2459:

  A ball of mass 0.5kg moving at 10ms${}^{-1}$ collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

  Options:
  A) 0.2ms${}^{-1}$
  B) 0.5ms${}^{-1}$
  C) 5.0ms${}^{-1}$
  D) 5.5ms${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 2460: In alternating current theory, the units of impedance, r.m.s. voltage and resonance frequency are respectively equal to Options:
  A) volt, ampere and hertz
  B) ohms, volt and hertz
  C) watt, ohms and radian
  D) ohms, hertz and joule
  Show Answer
  The correct answer is B .