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 1651: A 12V battery supplies a current of 0.4A to a lamp. Calculate the resistance of the lamp. Options:
  A) 30.00
  B) 4.80
  C) 3.00
  D) 0.30
  E) 0.03
  Show Answer
  The correct answer is A .
• Question 1652: Which of the following has no effect on radiation? Options:
  A) nature of surface
  B) density
  C) surface area
  D) temperature
  Show Answer
  The correct answer is B .
• Question 1653: An ice cube floats in a glass of water filled to the brim. What happens when the ice melts? Options:
  A) The water level remains the same
  B) there is a drop in the level of water in the glass due to condensation on its outside
  C) the water in the glass overflows
  D) the level of water drops because melted ice occupies less volume
  E) none of the above is correct
  Show Answer
  The correct answer is A .
• Question 1654: Momentum and Kinetic energy are conserved in Options:
  A) Inelastic collision
  B) Elastic collision
  C) Explosion
  D) Spacecraft
  Show Answer
  The correct answer is B .
• Question 1655: If a charged ion goes through combined electric and magnetic fields, the resultant emergent velocity of the ion is Options:
  A) E/B
  B) EB
  C) B/E
  D) E - B
  Show Answer
  The correct answer is A .
• Question 1656: The thermos flask is designed to? Options:
  A) prevent heat loss or gain by conduction, convection amd radiation
  B) store hot tea or water
  C) prevent heat gain by conduction, convection and radiation
  D) prevent head lost conduction, convention and radiation
  Show Answer
  The correct answer is A .
• Question 1657: If a body mass 5kg is thrown vertically upwards with velocity u,at what height will the potential energy equal to the kinetic energy? Options:
  A) h =(u)²/g
  B) h = (u)²/4g
  C) h = (2u)²/g
  D) h = (u)²/2g
  Show Answer
  The correct answer is B .
• Question 1658: A certain radioisotope of ${}_{92}^{235}U$ emits four alpha particles and three beta particles. The mass number and the atomic number of the resulting elements respectively are Options:
  A) 219 and 87
  B) 84 and 223
  C) 223 and 87
  D) 219 and 81
  Show Answer
  The correct answer is A .
• Question 1659: Which of the following correctly describes the energy changes in the generation of light by a hydroelectric power station? Options:
  A) Electrical $\to$ mechanical $\to$ potential
  B) potential $\to$mechanical $\to$electrical $\to$ light
  C) mechanical $\to$ sound $\to$ electrical $\to$ light
  D) kinetic $\to$ mechanical $\to$ electrical $\to$light
  Show Answer
  The correct answer is B .
• Question 1660: A cube of sides 0.1m hangs freely from a string. What is the upthrust on the cube when totally immersed in water? [density of water is 1000kgm^-2, g = 10ms^-2] Options:
  A) 1000 N
  B) 700 N
  C) 110 N
  D) 10 N
  Show Answer
  The correct answer is D .