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 401: 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 402: Which of the following elements is the best absorber of X-rays? Options:
  A) hydrogen
  B) oxygen
  C) calcium
  D) copper
  E) lead
  Show Answer
  The correct answer is E .
• Question 403: A note is called an octave of another note when Options:
  A) its frequency is twice that of the first note
  B) its frequency is half of the first note
  C) the notes have the same fundamental frequency
  D) its periodic time is twice that of the first note
  Show Answer
  The correct answer is A .
• Question 404: The particle nature of light is demonstrated by the Options:
  A) photoelectric effect
  B) speed of light
  C) colours of light
  D) diffraction of light
  Show Answer
  The correct answer is A .
• Question 405:

  The energy associated with the photon of a radio transmission at 3 x 10⁵ Hz is

  [h = 6.63 x 10^-34Js]

  Options:
  A) 2.00 x 10^-28J
  B) 1.30 x 10^-28J
  C) 2.00 x 10^{- 29}J
  D) 1.30 x 10^-29J
  Show Answer
  The correct answer is A .
• Question 406: Which of the following properties is/are common to all waves? i. Diffraction ii. Refraction iii. Interference Options:
  A) i only
  B) ii only
  C) ii and iii
  D) i, ii, and iii
  Show Answer
  The correct answer is D .
• Question 407: Under constant tension and constant mass per unit length, the note produced by a plucked string is 500Hz when the length of the string is 0.90m. At what length is the frequency 150Hz? Options:
  A) 3m
  B) 4m
  C) 5m
  D) 6m
  Show Answer
  The correct answer is A .
• Question 408: Which of the following operations can be used to convert an alternative current dynamo into a direct current dynamo Options:
  A) number of turns in the coil is increased
  B) strength of the field magnet is increased
  C) slip rings are replaced with split ring cummutator
  D) coil is wound on a soft iron armature
  Show Answer
  The correct answer is C .
• Question 409:

  The equation of a wave traveling along the positive x-direction is given by; y = 0.25 x 10${}^{-3}$ sin (500t - 0.025x). Determine the angular velocityof the wave motion.

  Options:
  A) 0.25 x 10${}^{-3}$rads${}^{-1}$
  B) 0.25 x 10${}^{-1}$rads${}^{-1}$
  C) 5.00 x 10${}^2$rads${}^{-1}$
  D) 2.50 x 10${}^3$rads${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 410: In a compound microscope Options:
  A) there is only one lens
  B) the objective lens have a shorter focal length than the eyepiece which is convex
  C) the objective lens has a longer focal length than the eyepiece which is convex
  D) the objective lens has a shorter focal length than the eyepiece which is concave
  E) the objective and the eyepiece are both convex and have the same focal length
  Show Answer
  The correct answer is B .