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 981: An object of mass 50kg is released from a height of 2m.Find the kinetic energy just before it strikes the ground Options:
  A) 250J
  B) 1000J
  C) 10 000J
  D) 100 000J
  Show Answer
  The correct answer is B .
• Question 982:

  An explosion occurs at an altitude of 312 m above the ground. If the air temperature is -10.00°C, how long does it take the sound to reach the ground?

  [velocity of sound at $0^{o}C$ = 331 ms-1]

  Options:
  A) 0.94s
  B) 0.96s
  C) 0.93s
  D) 0.95s
  Show Answer
  The correct answer is B .
• Question 983: The difference of potential between the terminals of cells is 2.2 volts. When a 4ohm resistor is connected across the terminals of this cells, the potential difference is 2 volts. What is the internal resistance of the cell? Options:
  A) 0.10 ohms
  B) 0.25ohms
  C) 0.40ohms
  D) 2.50ohms
  E) 4.00ohms
  Show Answer
  The correct answer is C .
• Question 984: An element and its isotope only differ in the number of Options:
  A) protons
  B) electrons
  C) ions
  D) neutrons
  Show Answer
  The correct answer is D .
• Question 985: A calorimeter of thermal capacity 80J contains 20g of water at 25^oC. Water at 100^oC is added so that the final temperature of the set-ups is 50^oC. The amount of water added is (Heat capacity of water = 4.18J/g/^oC) Options:
  A) 20g
  B) 25g
  C) 45g
  D) 50g
  E) 100g
  Show Answer
  The correct answer is A .
• Question 986:

  

  Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is

  Options:
  A) 0.30
  B) 0.60
  C) 1.67
  D) 2.33
  E) 2.36
  Show Answer
  The correct answer is C .
• Question 987:

  

  The net capacitance of the circuit shown above is

  Options:
  A) 8.0µF
  B) 6.0µF
  C) 4.0µF
  D) 2.0µF
  Show Answer
  The correct answer is D .
• Question 988:

  When the breaks in a car are applied, the frictional force on the tyresis?

  Options:
  A) a disadvantage because it is in the direction of the motion of the car
  B) a disadvantage because it is in the opposite direction of the motion of the car
  C) an advantage because it is in the direction of the motion of the car
  D) an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 989: Two liquids X and Y having the same mass are supplied with the same quantity of heat. If the temperature rise in X is twice that of Y, the ratio of specific heat capacity of X to that of Y is Options:
  A) 2:1
  B) 1:2
  C) 4:1
  D) 1:4
  Show Answer
  The correct answer is A .
• Question 990: In which of the following material media will sound travel fastest? Options:
  A) oil
  B) metal
  C) gas
  D) water
  Show Answer
  The correct answer is B .