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 441: A body which weighs 50N in air displaces 3.7kg of water when partially immersed in water. Calculate the upthrust on the body? Options:
  A) 8.7N
  B) 37.0N
  C) 87.0N
  D) 13.0N
  Show Answer
  The correct answer is B .
• Question 442: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 443: Which of the following statements about the concept of solid friction is NOT true? Options:
  A) It always acts in the direction of motion
  B) It causes wear and tear in car tyres
  C) It depends on the nature of the surfaces in contact
  D) It is independent of the area of the surfaces in contact.
  E) It reduces the efficiency of the machine
  Show Answer
  The correct answer is A .
• Question 444: The phenomenon that shows that increase in pressure lowers the melting point can be observed in Options:
  A) sublimation
  B) condensation
  C) coagulation
  D) regelation
  Show Answer
  The correct answer is D .
• Question 445: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 446: One of the features of the fission process is that Options:
  A) its products are not radioactive
  B) it leads to chain reaction
  C) neutrons are not released
  D) the sum of the masses of the reactants equals the sum of masses of the products
  Show Answer
  The correct answer is B .
• Question 447: A step-down transformer has a power output of 50 W and efficiency of 80%. if the mains supply voltage is 200 v, calculate the primary current of the transformer. Options:
  A) 0.31 A
  B) 3.20 A
  C) 3.40 A
  D) 5.00 A
  Show Answer
  The correct answer is A .
• Question 448: A waterfall is 1.260m high. Calculate the change in temperature of a quantity of water that falls from the top to the bottom of the waterfall. (Neglect heat losses to the surroundings, take g as 10m^-2 and specific heat capacity of water as 4200Jkg^-1K^-1) Options:
  A) 0.3^oC
  B) 3.0^oC
  C) 33.3^oC
  D) 42.0^oC
  E) 100.0^oC
  Show Answer
  The correct answer is B .
• Question 449: A force F required to keep a 5 kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms^-1. What is the speed, if the force is tripled? Options:
  A) 4.0 ms^-1
  B) 6.6 ms^-1
  C) 12.1 ms^-1
  D) 21.0 ms^-1
  Show Answer
  The correct answer is C .
• Question 450: Calculate the upthrust on an object of volume 50cm³ which is immersed in liquid of density 103kgm^-3 [g = 10ms^-2] Options:
  A) 0.8N
  B) 2.5N
  C) 0.5N
  D) 1.0N
  Show Answer
  The correct answer is C .