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 141:

  Rainbow formation is as a result of the combination of which of the following phenomena?
  (i) Reflection
  (ii) Dispersion
  (iii) Total internal reflection
  (iv) Refraction

  Options:
  A) (ii) and (iv) only
  B) (i), (iii) and (iv) only
  C) (ii), (iii) and (iv) only
  D) (i), (ii) and (iv) only
  Show Answer
  The correct answer is C .
• Question 142: The equation of transverse wave traveling along a string is given by Y = 0.3 sin(0.5x - 50t) where Y and X are in cm and t is in seconds.Find the maximum displacement of the particles from the equilibrium position Options:
  A) 50.0cm
  B) 2.5 cm
  C) 0.5cm
  D) 0.3cm
  Show Answer
  The correct answer is D .
• Question 143: Which of the following waves can propagate through a vacuum? Options:
  A) High velocity sound waves
  B) Ultrasonic waves
  C) Acoustic waves
  D) Infra-red waves
  Show Answer
  The correct answer is D .
• Question 144: Lenz’s law of electromagnetic induction states that Options:
  A) e.m.f. is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
  B) the induced e.m.f. in a circuit is proportional to the rate of change f the number of lines of force linking the circuit
  C) the induced current in a conductor is in such a direction as to oppose the change producing it
  D) a force is exerted in a current-carrying conductor in a magnetic field.
  E) the induced e.m.f. is proportional to the current producing the magnetic flux.
  Show Answer
  The correct answer is C .
• Question 145: When light is incident on an object which is magenta in colour, which of the following colour would be absorbed? Options:
  A) Red and blue
  B) Green only
  C) Red and green
  D) Red only
  Show Answer
  The correct answer is B .
• Question 146:
  

  The effect of closing the key K in the circuit shown in the figure above would be to?

  Options:
  A) increase the current by 0.4A
  B) reduce the current by 0.4A
  C) increase the current by 0.6A
  D) reduce the current by 0.6A
  Show Answer
  The correct answer is A .
• Question 147:

  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 148: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 149:

  Notes of the same frequency sounded on a piano and on a flute may differ inI. pitch

  II. quality

  III. Loudness

  Options:
  A) I only
  B) II only
  C) I and III only
  D) II and III only
  E) I, II and III
  Show Answer
  The correct answer is D .
• Question 150:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .