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 81: The speed of light in a Hg in the morning at a temperature of 27^oC. Hard driving in the afternoon raised the temperature of the tyres by 57^oC. The tyre pressure had by the afternoon was Options:
  A) increased by 15.0cm Hg
  B) decreased by 15.0cm Hg
  C) increased by 22.50cm
  D) decreased by 22.50cm Hg
  E) remained constant
  Show Answer
  The correct answer is A .
• Question 82:

  A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if, starting from rest, the mass acquires a velocity of 4ms^-1 in 8s [g = 10ms^-2]

  Options:
  A) 5N
  B) 50N
  C) 95N
  D) 105N
  Show Answer
  The correct answer is C .
• Question 83: When a ball rolls on a smooth level ground, the motion of its center is Options:
  A) translational
  B) oscillatory
  C) random
  D) rotational
  Show Answer
  The correct answer is A .
• Question 84: A constant force of %n acts for a % seconds on a mass of 5kg initially at rest. Calculate the final momentum Options:
  A) 125kgms−1
  B) 25kgms−1
  C) 15kgms−1
  D) 0kgms−1
  Show Answer
  The correct answer is B .
• Question 85: Which of the following is stored by a dry Leclanche cell? Options:
  A) Electrical power
  B) Kinetic energy
  C) Electric current
  D) Chemical energy
  Show Answer
  The correct answer is D .
• Question 86: A person can focus objects when they lie beyond 75 cm from his eyes. The focal length of the lens required to reduce his least distance of distinct vision to 25 cm is? Options:
  A) 37.50 cm
  B) 75.00 cm
  C) 18.75
  D) 25.00 cm
  Show Answer
  The correct answer is A .
• Question 87: The product PV where P is pressure and V is volume has the same unit as Options:
  A) force
  B) power
  C) energy
  D) accelaration
  Show Answer
  The correct answer is C .
• Question 88: Which of the following is TRUE of the particles emitted in radioactive disintegration? Options:
  A) the alpha particle is the helium nucleus H
  B) the alpha particle is lighter than the beta particle
  C) the alpha particle is deflected more than the beta particle in a magnetic field
  D) the beta particle is deflected more than the alpha particle in a magnetic field
  Show Answer
  The correct answer is D .
• Question 89:

  Calculate the heat energy required to vaporize 50g of water initially at 80ºCif the specific heat capacity of water is 4.23jg${}^{-1}$k${}^{-1}$ (specific latent heat of vaporization of water is 2260jg${}^{-1}$

  Options:
  A) 530000J
  B) 23200J
  C) 17200J
  D) 130000J
  Show Answer
  The correct answer is D .
• Question 90: Which of the following has the lowest internal resistance when new? Options:
  A) leclanche cell
  B) Daniel cell
  C) Accumulator
  D) Torch battery
  Show Answer
  The correct answer is C .