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 1621: A cell of internal resistance 1Ω supplies current to an external resistor of 3Ω. The efficiency of the cell is Options:
  A) 25%
  B) 33%
  C) 50%
  D) 75%
  Show Answer
  The correct answer is D .
• Question 1622:

  A ball of mass 0.5kg moving at 10ms${}^{-1}$ collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

  Options:
  A) 0.2ms${}^{-1}$
  B) 0.5ms${}^{-1}$
  C) 5.0ms${}^{-1}$
  D) 5.5ms${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 1623: 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 .
• Question 1624: Light of wavelength 5000 x 10^-8cm travels in free space with a velocity of 3 x 10⁸ms^-1. What is its wavelength in glass of refractive index 1.5? Options:
  A) 3333 x 10^-8cm
  B) 5000 x 10^-8cm
  C) 6666 x10^-8cm
  D) 750010^-8cm
  Show Answer
  The correct answer is A .
• Question 1625: A simple pendulum, 0.6m long, has a period of 1.5s. What is the period of a similar pendulum of 0.4m length in the same location? Options:
  A) $1.5\frac{\sqrt{2}}{3}$s
  B) $1.5\frac{\sqrt{3}}{2}$s
  C) 2.25s
  D) 1.00s
  E) 2.00s
  Show Answer
  The correct answer is A .
• Question 1626:

  In the molecular explanation, heat is transferred by the

  Options:
  A) free electrons
  B) free atoms
  C) free molecules
  D) free solids
  Show Answer
  The correct answer is A .
• Question 1627: In a fission process, the decrease in mass is 0.01%. How much energy could be obtained from the fission of 0.1g of the material Options:
  A) $9.0\times {10}^{9}J$
  B) $9.0\times {10}^{10}J$
  C) $6.3\times {10}^{11}J$
  D) $9.0\times {10}^{11}J$
  Show Answer
  The correct answer is A .
• Question 1628: Which of the following are produced after a nuclear fusion process? i. one heavy nucleus. ii. neutrons^-1. iii. protons. iv. Energy. Options:
  A) i and ii
  B) i and iv
  C) ii and iii
  D) ii and iv
  Show Answer
  The correct answer is B .
• Question 1629:

  A copper rod, 5m long when heated through 20c, expands by 1mm. If a second copper rod, 2.5m long is heated through 5c, by how much will it expand?

  Options:
  A) 4mm
  B) 2mm
  C) 0.25mm
  D) 0.12mm
  Show Answer
  The correct answer is B .
• Question 1630:

  One of the features of the fission process is that

  Options:
  A) it leads to chain reaction
  B) its products are not radioactive
  C) neutrons are not released
  D) the of the masses of the reactants equals the sum of the masses of the products
  Show Answer
  The correct answer is A .