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 521: The speed of light in air is 3 x 10⁸ms^-1. What is the speed in glass with a refractive index of 1.50? Options:
  A) 1.5 x 10⁸ms^-1
  B) 3.0 x 10⁸ms^-1
  C) 2.0 x 10⁸ms^-1
  D) 6.0 x 10⁸ms^-1
  Show Answer
  The correct answer is C .
• Question 522: The specific latent heat of vaporization of a substance is always Options:
  A) less than its specific latent heat of fusion
  B) greater than its specific heat of fusion
  C) equal to its specific latent heat of fusion
  D) all of the above depending on the nature of the substance
  E) none of the above
  Show Answer
  The correct answer is B .
• Question 523:

  I. A liquid boils when its saturated vapor pressure is equal to the external pressure
  II. Dissolved substances in pure water lead to an increase in the boiling point.
  III. When the external pressure is increased, the boiling point increases.
  IV. Dissolved substances in pure water decreases the boiling point

  Which of the above combinations are peculiarities of the boiling point of a liquid?

  Options:
  A) I, II and III only
  B) I, II, III, and IV
  C) I, II, and IV
  D) II, III, and IV
  Show Answer
  The correct answer is A .
• Question 524: If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface? Options:
  A) sin^-1$\frac{1}{2}$
  B) sin^-1$\frac{2}{3}$
  C) sin^-1$\frac{3}{4}$
  D) sin^-1$\frac{8}{9}$
  Show Answer
  The correct answer is B .
• Question 525: Quantities of heat Q can be measured using a container called Options:
  A) Thermometer
  B) Measuring cylinder
  C) Calorimeter
  D) Meter rule
  Show Answer
  The correct answer is C .
• Question 526: If the fraction of the atoms of a radioactive material left after 120years is 1/64, what is the half-life of the material? Options:
  A) 24 years
  B) 20 years
  C) 10 years
  D) 2 years
  Show Answer
  The correct answer is B .
• Question 527: One valid assumption of the kinetic theory of gasses is the Options:
  A) the molecules of a gas are constantly in a state of motion and the number of collision remains constant
  B) the number of molecule of gas increases with increasing pressure
  C) as the temperature increases, the number of collision made by the gas molecule remains constant
  D) the molecules of gas are all identical and are very small in size
  Show Answer
  The correct answer is D .
• Question 528: Which of the following can be described as high tension transmission? Options:
  A) high resistance and low voltage
  B) low current and high voltage
  C) high current and low voltage
  D) high voltage and zero current
  E) high current and low resistance
  Show Answer
  The correct answer is B .
• Question 529: A galvanometer has a resistance of 5Ω. By using a shunt wire of resistance 0.05Ω, the galvanometer could be converted to an ammeter capable of reading 2Amp. What is the current through the galvanometer? Options:
  A) 2mA
  B) 10mA
  C) 20mA
  D) 25mA
  Show Answer
  The correct answer is C .
• Question 530: What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100^oC to 80^oC? [the specific latent heat of steam is 2,260,000Jkg^-1, specific heat capacity of water is 4200Jkg^-1K^-1] Options:
  A) 4200J
  B) 2,260,OOOJ
  C) 9,040,000J
  D) 9,380,000J
  Show Answer
  The correct answer is C .