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 971: When the temperature difference between the wet and dry bulbs of a hygrometer is high, this indicates that Options:
  A) it is about to rain
  B) the relative humidity is high
  C) there is plenty of sunshine
  D) the relative humidity is low
  Show Answer
  The correct answer is D .
• Question 972:

  Which statements(s) is/are NOT true?

  I. A saturated vapour is one that is in equilibrium with its liquid in a closed space.
  II. A vapour contains molecules with varying kinetic energy and their distances apart are smaller than those of the molecules of a liquid
  III. Relative Humidity = $\frac{\text{Saturated vapour pressure at dew point}}{\text{Saturated vapour pressure at air temperature}}$ x 100%
  IV. The saturated vapour pressure of water increases with temperature

  Options:
  A) I only
  B) II only
  C) II and III only
  D) III and IV only
  E) II, III and IV only
  Show Answer
  The correct answer is B .
• Question 973: A note, A from a guitar produces a wave of amplitude 4 mm and frequency 1000 Hz. Another note, B from a whistle produces a similar waveform of amplitude 2 mm and frequency 2200 Hz. If the two notes are compared, Options:
  A) A has a higher pitch than B
  B) A is louder than B.
  C) B has a greater speed than A
  D) B is louder than A
  E) A and B have the same quality
  Show Answer
  The correct answer is B .
• Question 974: Calculate the wavelength of light travelling with a speed of 3 × 108ms^-1 and a frequency of 6.2 × 10¹⁴Hz. Options:
  A) 4.8 × 10^-8m
  B) 4.8 × 10^-7m
  C) 4.8 × 10^-6m
  D) 4.8 × 10^-5m
  E) 4.8 × 10^-4m
  Show Answer
  The correct answer is B .
• Question 975: Which of the following statements about friction is NOT correct? Options:
  A) The force of kinetic friction is less than the force of static friction
  B) The force of kinetic friction between two surfaces is independent of the areas in contact provided the normal reaction is unchanged
  C) The force of rolling friction between two surfaces is less than the force of sliding friction
  D) The angle of friction is the angle between the normal reaction and the force of friction
  E) Friction may be reduced by lubriction
  Show Answer
  The correct answer is A .
• Question 976: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 977: The wavelength of the first overtone of a note in a closed pipe of length 33 cm is? Options:
  A) 33 cm
  B) 44 cm
  C) 22 cm
  D) 17 cm
  Show Answer
  The correct answer is B .
• Question 978: 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 979: A transformer is required to give 120V from a 240V mains supply. If the primary has 5500 turns, how many turns has the secondary? Options:
  A) 232
  B) 450
  C) 550
  D) 2750
  E) 11000
  Show Answer
  The correct answer is D .
• Question 980:

  What quantity of heat is required to convert 20 g of ice at 0 ºC to water at the same temperature? (Specific latent heat of ice = 336 Jg${}^{-1}$)

  Options:
  A) 7.06 x 10${}^3$J
  B) 5.38 x 10${}^3$J
  C) 6.72 x 10${}^3$J
  D) 1.35 x 10${}^3$J
  Show Answer
  The correct answer is C .