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 871: A projectile fired with initial velocity, u will attain its maximum height H when the angle of projection θ is Options:
  A) 30°
  B) 45°
  C) 60°
  D) 75°
  E) 90°
  Show Answer
  The correct answer is E .
• Question 872: The half-life of a radioactive substance is 2 seconds. Calculate the decay constant. Options:
  A) 2.890 s^-1
  B) 1 .445 s^-1
  C) 0.576 s^-1
  D) 0.347s^-1
  E) 0.152 s^-1
  Show Answer
  The correct answer is D .
• Question 873: The best material for the core of the primary and secondary coils of an induction coil is Options:
  A) copper, because it has a good conductor of electricity
  B) steel, because it becomes magnetic and retains its magnetism for a long time
  C) rubber, because it is a good insulator and the user is prevented from shock
  D) soft iron, because it becomes magnetic but easily loses its magnetism
  E) glass, because it is transparent
  Show Answer
  The correct answer is D .
• Question 874: If a mango fruit dropped at a height of 50 meters. How long does it reach the ground? (take g = 10m/s²) Options:
  A) 2 sec
  B) 3 sec
  C) 4sec
  D) 3.2sec
  Show Answer
  The correct answer is D .
• Question 875:

  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 876: In a good thermos flask, the main cause of heat loss is? Options:
  A) conduction through the cork
  B) the plastic base of the thermos flask
  C) the silvered walls and shiny metals
  D) the outer cover or jacker
  Show Answer
  The correct answer is A .
• Question 877: An object is placed at 5.6 x 10^-4m in front of a converging lens of focal length 1.0 x 10^-nm. The image formed is Options:
  A) Real, Erect and magnified
  B) Virtual, erect and magnified
  C) Real, inverted and magnified
  D) Virtual, erect and diminished
  Show Answer
  The correct answer is C .
• Question 878:

  A parallel plate capacitor separated by an air gap is made of $0.8m^2$tin plates and 20 mm apart. It is connected to 120 V battery. What is the charge on each plate?

  Take ${\epsilon }_o$ = $8.85\times {10}^{-}12F{m}^{-}1$

  Options:
  A) 3.54nC
  B) 42.5nC
  C) 35.4nC
  D) 4.25nC
  Show Answer
  The correct answer is B .
• Question 879: An object moves with uniform speed round a circle. Its acceleration has Options:
  A) constant magnitude and constant direction
  B) constant magnitude and varying direction
  C) varying magnitude but constant direction
  D) varying magnitude and varying direction
  Show Answer
  The correct answer is B .
• Question 880: The pressure of a gas when cooled at constant volume will decrease because the molecules Options:
  A) collide less frequently with the walls of the container
  B) have the same average kinetic energy
  C) break up into smaller molecules
  D) decrease in number
  Show Answer
  The correct answer is A .