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 1511: The equation P^aV^bT^c= constant reduces to Charles Law if Options:
  A) a=1, b=1and c=0
  B) a=1, b=0 and c=-1
  C) a=0, b=1 and c=1
  D) a=0, b=1 and c=-1
  Show Answer
  The correct answer is D .
• Question 1512: A radio is operated by eight cells each of e.m.f. 2.0V connected in series. If two of the cells are wrongly connected, the net e.m.f. of the radio is Options:
  A) 8V
  B) 10V
  C) 12V
  D) 16V
  Show Answer
  The correct answer is C .
• Question 1513: Which of the following is a scalar quantity? Options:
  A) Tension
  B) Weight
  C) Impulse
  D) Upthrust
  E) Distance
  Show Answer
  The correct answer is E .
• Question 1514: To produce a parallel beam of light from a concave mirror, the distance at a which the lamp should be placed from the mirror is equal to Options:
  A) the focal length
  B) two times the focal length
  C) the distance of the image
  D) two times the radius of curvature
  Show Answer
  The correct answer is A .
• Question 1515:

  

  In the circuit above, the ammeter reads a current of 5.0 A when R = 8Ω and reads 7.0A when R = 5Ω. The value of the unknown resistance X is

  Options:
  A) 10.0Ω
  B) 7.5Ω
  C) 5.0Ω
  D) 2.5Ω
  Show Answer
  The correct answer is D .
• Question 1516:

  

  In the diagram above, the ratio of he electric power dissipated in the 6Ω and the 3Ω resistor respectively is

  Options:
  A) 2:1
  B) 2:2
  C) 1:3
  D) 1:2
  Show Answer
  The correct answer is D .
• Question 1517:

  The process whereby a liquid turns spontaneously into vapour is called

  Options:
  A) regelation
  B) evaporation
  C) boiling
  D) sublimation
  Show Answer
  The correct answer is B .
• Question 1518:

  

  In the circuit diagram above, calculate the current in the 12 Ω resistor if the cell has an emf of 12V and an internal resistance of 1Ω

  Options:
  A) 0.8A
  B) 1.0A
  C) 1.6A
  D) 2.4A
  Show Answer
  The correct answer is D .
• Question 1519: What happens when a, certain quantity of pure ice is completely changed to water at 0^oC? Options:
  A) latent heat is absorbed, the mass remains constant, and the volume decreases
  B) latent heat is given out, the mass remains constant and the volume decreases
  C) latent heat is given out, the mass increases and the volume remains constant
  D) latent heat is absorbed, the mass decreases and the volume increases
  Show Answer
  The correct answer is B .
• Question 1520:

  In which of the following device in the expansion of solid is a disadvantages?

  I. Simple pendulum

  II. Fire alarms

  III. Thermostat

  IV. Bimetallic thermometer

  Options:
  A) III only
  B) II & III only
  C) I only
  D) II, III & IV only
  Show Answer
  The correct answer is C .