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 451: Light of energy 5eV falls on a metal of work function 3eV and electrons are liberated. The stopping potential is Options:
  A) 1.7V
  B) 2.0V
  C) 8.0V
  D) 15.0V
  Show Answer
  The correct answer is B .
• Question 452:

  

  The fig above shows two connected bodies of masses M1 and M2 in equilibrium under gravity. The tension in the upper string is

  Options:
  A) (m1-m2)g
  B) m1g
  C) m2g
  D) (m1+m2)g
  Show Answer
  The correct answer is D .
• Question 453: A liquid-in-glass thermometer should quickly register temperature changes. This is achieved by choosing a liquid that Options:
  A) is opaque
  B) has high density
  C) has regular expansion
  D) has a high thermal conductivity
  E) can wet glass
  Show Answer
  The correct answer is D .
• Question 454:

  

  Fig 8 shows a current I flowing in a copper wire situated in a magnetic field existing between the pole-pieces of a horse-shoe magnet.

  Which of the following statements is correct?

  Options:
  A) The wire will experience a force in the direction into the paper
  B) The wire will experience a force in the direction out of the paper
  C) The wire will vibrate in a direction into and out of the paper
  D) the wire will move in the direction of the field i.e toward the s-pole
  E) the wire will not move because it is made of copper which is non magnetic
  Show Answer
  The correct answer is B .
• Question 455: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 456: Which of the following is NOT a vector quantity? Options:
  A) altitude
  B) acceleration
  C) displacement
  D) weight
  Show Answer
  The correct answer is A .
• Question 457: 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 458: The boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each of two tin cans. The physical principle employed is that sound travels Options:
  A) mainly through air
  B) fainter in stretched string
  C) faster through gases than in solids and liquids
  D) with greater ease through a string than in air
  E) none of the above is correct
  Show Answer
  The correct answer is D .
• Question 459: An air craft attempt too fly due north at 100 kmh^-1. If the wind blows against it from east to west at 60 kmh^-1, its resultant velocity is Options:
  A) 117 kmh^-1, N31^oE
  B) 127 kmh^-1, N31^oE
  C) 117 kmh^-1, N31^oW
  D) 127 kmh^-1, N31^oW
  Show Answer
  The correct answer is C .
• Question 460: What is the acceleration due to gravity 'g' on the moon, if g is 10^-2 on the earth? Options:
  A) 0. 10 ms^-2
  B) 0.74ms^-2
  C) 1.6ms^-2
  D) 10.00ms^-2
  Show Answer
  The correct answer is C .