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 2221: A man of mass 50kg ascends a flight of stains 5m high in 5 seconds. If acceleration due to gravity is 10ms${}^{-2}$ the power expended is Options:
  A) 100w
  B) 200w
  C) 400w
  D) 500w
  Show Answer
  The correct answer is D .
• Question 2222: When an ebolite rod is rubbed with fur, it has Options:
  A) no charge at all
  B) a negative charge
  C) a positive charge
  D) negative and positive charges
  Show Answer
  The correct answer is B .
• Question 2223: If the threshold frequency for tungsten is 1.3 x 10¹⁵Hz, what is its work function?
  [H = 6.6 x 10^-34 Js] Options:
  A) 8.58 x 10^-19 J
  B) 8.50 x 10^-15 J
  C) 8.58 x 10^-17 J
  D) 8.85 x 10^-18
  Show Answer
  The correct answer is A .
• Question 2224:

  

  Fig 12 above shows the velocity time graph of a car which starts from rest and is accelerated uniformly at the rate of 3m sec^-2 for 5 seconds. It attains a velocity which is maintained for a minute, The car is then brought to rest by a uniform retardation after another 3 seconds. calculate the total distance covered

  Options:
  A) 900m
  B) 1920m
  C) 960m
  D) 860m
  Show Answer
  The correct answer is C .
• Question 2225: 1kg of copper is transferred quickly from boiling water to a block of ice. Calculate the mass of ice melted, neglecting heat loss. [specific heat capacity of copper 400Jkg^-1K^-1 and latent heat of fusion of ice 333 x 10³Jkg^-1] Options:
  A) 60g
  B) 67g
  C) 120g
  D) 133g
  Show Answer
  The correct answer is C .
• Question 2226: To convert an alternating current dynamo into a direct current dynamo, the Options:
  A) number of turns in the coil is increased
  B) strength of the field magnet is increased
  C) slip rings are replaced with a split ring commutator
  D) coil is wound on a soft iron armature
  Show Answer
  The correct answer is C .
• Question 2227: The height at which the atmosphere ceases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is Options:
  A) 380mmHg
  B) 570mmHg
  C) 190mmHg
  D) 480mmHg
  Show Answer
  The correct answer is B .
• Question 2228:

  In the molecular explanation, heat is transferred by the

  Options:
  A) free electrons
  B) free atoms
  C) free molecules
  D) free solids
  Show Answer
  The correct answer is A .
• Question 2229: The surfaces of conveyor belts are made rough so as to Options:
  A) protect them while carrying loads
  B) prevent the loads from slipping
  C) enable them to carry more load
  D) make them stronger
  Show Answer
  The correct answer is B .
• Question 2230: When temperature of a liquid increases, its surface tension Options:
  A) Decreases
  B) Increases
  C) Remain Constant
  D) Increases then decreases
  Show Answer
  The correct answer is A .