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 511: The image in a pin-hole camera is Options:
  A) errect and formed by refraction through a lens
  B) virtual and formed by dispersion
  C) erect and gets sharper as the hole becomes larger
  D) inverted and formed by the light from each point travelling in a straight line
  Show Answer
  The correct answer is D .
• Question 512: What is the frequency of the sound made by a siren having a disc with 32 holes and making 25 revolution per seconds? Options:
  A) 80Hz
  B) 600Hz
  C) 800Hz
  D) 1600Hz
  Show Answer
  The correct answer is C .
• Question 513:

  "Sum of all forces acting on a body is zero." This condition represents equilibrium'

  Options:
  A) First condition
  B) Second condition
  C) Third condition
  D) Fourth condition
  Show Answer
  The correct answer is A .
• Question 514: Which of the following is true of sounds? Options:
  A) sound travels faster in air at 20^oC than at 30^oC
  B) the frequency of a given sound wave changes when it crosses the boundary seperating two media
  C) the wavelength of a given sound wave in air decreases as the temperature increases
  D) sound waves cannot be reflected
  Show Answer
  The correct answer is C .
• Question 515: The most suitable type of mirror used for the construction of the search light is the Options:
  A) concave mirror
  B) convex mirror
  C) spherical mirror
  D) parabolic mirror
  Show Answer
  The correct answer is D .
• Question 516: A radio station broadcast at a frequency of 600KHZ. If the speed of light in air is 3 × 108ms${}^{-1}$. Calculate the wavelength of the radio wave Options:
  A) 2.20 × 10${}^3$m
  B) 5.0 × 10${}^2$m
  C) 5.0 × 10${}^5$m
  D) 11.8 × 10${}^{11}$m
  Show Answer
  The correct answer is B .
• Question 517:

  The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a?

  Options:
  A) concave mirror of focal length 5cm
  B) concave mirror of focal length 10cm
  C) convex mirror of focal length 5cm
  D) convex mirror of focal length 10cm
  Show Answer
  The correct answer is C .
• Question 518: If the capacitance of an capacitor is C = (εA)/d, which of the following parameters is varied when a variable capacitors is used for tuning radio sets? Options:
  A) constant (ε) and area
  B) area and distance.
  C) constant (ε) only
  D) distance only
  Show Answer
  The correct answer is B .
• Question 519:

  A train of mass 1600 kg attains a speed of 25 ms${}^{-1}$ in 20 seconds. The power developed in the engine is?

  Options:
  A) 2.5 KW
  B) 80 KW
  C) 25 KW
  D) 50 KW
  Show Answer
  The correct answer is D .
• Question 520: Which of the following statements is applicable to a real image formed by a concave mirror? i. it can be observed on a screen ii. it is always inverted and in front of the mirror iii. it only seams to exist IV. it is formed by the actual converging of rays of light Options:
  A) i, ii and iii
  B) i, ii and iv only
  C) i and ii only
  D) i and ii only
  E) all four statements
  Show Answer
  The correct answer is B .