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 411: An inclined plane of angle $\theta$, acting as a simple machine, has a velocity ratio Options:
  A) sin$\theta$
  B) $\frac{1}{\text{sin}\theta }$
  C) cos$\theta$
  D) $\frac{1}{\text{cos}\theta }$
  E) sin$\theta cos\theta$
  Show Answer
  The correct answer is B .
• Question 412: Which of the following statements are true about the spring balance and the chemical balance? i. both are used to measure the mass of an object. ii. either of them may be used to measure the weight of an object. iii. the spring balance works on the principle of Hooke's law while the chemical balance works on the principle of moments. iv. a change in gravity does the readings of a spring balance but not that of a chemical balance. Options:
  A) i, and iv
  B) ii and iii
  C) ii and iv
  D) i, ii and iii
  E) i and iii
  Show Answer
  The correct answer is C .
• Question 413: Equal masses of copper and rubber are raised to the same temperature. After sometimes, the copper was observed to be at a lower temperature because Options:
  A) the specific heat capacity of copper is lower than that of rubber
  B) copper expands more than rubber
  C) the specific heat capacity of rubber is lower than that of copper
  D) rubber expands more than copper
  Show Answer
  The correct answer is A .
• Question 414: What gives rise to the line spectra observed in atoms? Options:
  A) change of an electron from a higher to a lower energy level in the atom
  B) disturbed protons in the nucleus
  C) excitation of an electron in the atom
  D) kinetic energy of a moving atom
  E) potential energy of an electron inside an atom
  Show Answer
  The correct answer is A .
• Question 415: An object placed at the bottom of a well full of clear water appears closer to the surface due to? Options:
  A) diffraction
  B) reflection
  C) refraction
  D) polarization
  Show Answer
  The correct answer is C .
• Question 416: Which of the following expressions gives the linear magnification produced by a concave mirror of radius of curvature r, if U and V are the object and image distances respectively? Options:
  A) $\frac{V}{r}$ - 1
  B) $\frac{2V}{r}$ - 1
  C) $\frac{U}{r}$ - 1
  D) $\frac{2U}{r}$ - 1
  Show Answer
  The correct answer is D .
• Question 417: The expansion of solids can be considered a disadvantage in the Options:
  A) balance wheel of a watch
  B) fitting of wheels on rims
  C) fire alarm
  D) thermostat
  Show Answer
  The correct answer is B .
• Question 418: Which of the following statements supports the assumption that light travels in straight lines? Options:
  A) light can be diffracted
  B) a source of light produces distinct shadows of opaque objects
  C) a source of light produces interference patterns on a suitably placed screen
  D) light can be reflected
  Show Answer
  The correct answer is B .
• Question 419: Which of the following apparatus will require the smallest fuse rating for its protection? Options:
  A) 60W, 240V
  B) 60W, 40V
  C) 40W, 12V
  D) 40W, 5V
  Show Answer
  The correct answer is A .
• Question 420: A ball of mass 100g falls from a height of 5m onto a concrete floor and rebounds to a height of 3m. Calculate the energy lost. (g = 10ms^-2) Options:
  A) 2J
  B) 20J
  C) 100J
  D) 1000J
  E) 2000J
  Show Answer
  The correct answer is A .