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 1771: Which of the following statements about electrolysis is NOT correct? Options:
  A) The substances in solution in the electrolyte become ionized
  B) Ions are electrically charged and are attracted towards electrodes when a potential difference is applied
  C) Ions may be discharged at the electrodes, forming bubbles or deposits
  D) The mass deposited depends upon the length of time for which current flows
  E) The mass of gas set free or metal deposited is proportional to the square of the current
  Show Answer
  The correct answer is E .
• Question 1772:

  The amount of heat needed to raise the temperature of 10kg of Copper by 1K is its

  Options:
  A) specific heat capacity
  B) latent heat
  C) heat capacity
  D) internal energy
  Show Answer
  The correct answer is A .
• Question 1773:

  The density of a certain oil on frying becomes

  0.4 kgm^-3 with the volume of 20m³. what will be its initial volume when its initial density is 0.8 kgm^-3 assuming no loss of oil due to spillage?

  Options:
  A) 12 kgm^-3
  B) 10 kgm^-3
  C) 8 kgm^-3
  D) 5 kgm^-3
  Show Answer
  The correct answer is B .
• Question 1774: The force of attraction between two point masses is 10^-4N when the distance between them is 0.18m. If the distance is reduced to 0.06m, calculate the force. Options:
  A) 1.1 x 10^-5N
  B) 3.3 x 10^-5N
  C) 3.0 x 10^-4N
  D) 9.0 x 10^-4N
  Show Answer
  The correct answer is D .
• Question 1775: An electric iron is rated at 1000watts, 250v. The corresponding maximum resistance and accompanying current is Options:
  A) 62.5A, 4.0$\mathrm{\Omega }$
  B) 16.0A, 62.5$\mathrm{\Omega }$
  C) 62.5A, 16.0$\mathrm{\Omega }$
  D) 4.0A, 62.5$\mathrm{\Omega }$
  E) 4.0A, 250$\mathrm{\Omega }$
  Show Answer
  The correct answer is D .
• Question 1776: The specific latent heat of fusion of lead is the amount of heat required to Options:
  A) melt lead at its melting point
  B) heat a unit mass of lead through 1^oC
  C) change the state of a unit mass of lead at its melting point
  D) change the state of a unit mass of lead at its boiling point
  Show Answer
  The correct answer is C .
• Question 1777:

  

  PQRS is rectangular cell with PQ perpendicular to the magnetic field as shown above. If a current flows in the the direction PQRS in what direction will the coil move

  Options:
  A) Upwards
  B) Downwards
  C) TOwards The North Pole
  D) Towards The South Pole
  Show Answer
  The correct answer is A .
• Question 1778: A hydraulic press has a large circular piston of radius 0.8m and a circular plunger of radius 0.2m. A force of 500N is exerted by the plunger. Find the force exerted on the piston Options:
  A) 8000N
  B) 4000N
  C) 2000N
  D) 31N
  Show Answer
  The correct answer is D .
• Question 1779:

  The slope of the straight line displacement-time graph indicates?

  Options:
  A) distance traveled
  B) uniform velocity
  C) uniform acceleration
  D) uniform speed
  Show Answer
  The correct answer is B .
• Question 1780:

  The momentum of a car moving at a constant speed in a circular track

  Options:
  A) can be both positive and negative
  B) can be zero depending on its position in the track
  C) can be zero depending on its position in the track
  D) a centrifugal
  Show Answer
  The correct answer is C .