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 921:

  I. They should be identical

  II. They should originate from the same source.

  III. They should be coherent.

  IV. They should be monochromatic.

  From the statements above, the conditions for two waves to interfere are?

  Options:
  A) I,II and III only
  B) I, III and IV only
  C) II, III and IV only
  D) I, II, III and IV
  Show Answer
  The correct answer is B .
• Question 922: The phenomenon of photoelectric effect is used in the following EXCEPT Options:
  A) automatic doors
  B) bugler alarm
  C) electric fire alarm
  D) sound production from film tracks
  E) television cameras
  Show Answer
  The correct answer is D .
• Question 923: In a resonance tube experiment, a tube fixed length is closed at one end and several tuning forks of increasing frequency used to obtain resonance at the open end. If the tuning fork with the lowest frequency which gave resonance had a frequency f₁ and the next tuning fork to give resonance had a frequency f₂, find the ratio $\frac{f^2}{f^2}$. Options:
  A) 8
  B) 3
  C) 2
  D) $\frac{1}{2}$
  E) $\frac{1}{3}$
  Show Answer
  The correct answer is B .
• Question 924:

  I It retains its magnetic much longer than steel.

  II It is more easily magnetized than steel

  III It is more easily demagnetized than steel

  IV It produces a stronger magnet than steel

  Which combination of the above makes iron preferable to steel in the making of electromagnets?

  Options:
  A) I and II only
  B) II and III only
  C) I, III, and IV only
  D) II, III and IV only
  Show Answer
  The correct answer is B .
• Question 925: If the refractive index of a medium in air is 2.0, what is the critical angle for this medium? Options:
  A) 30^o
  B) 42^o
  C) 45^o
  D) 50^o
  Show Answer
  The correct answer is A .
• Question 926: Which is NOT one of the laws of solid friction? Options:
  A) The frictional force between two surfaces opposes their relative motion
  B) The ratio of frictional force to the normal reaction varies for two given surfaces
  C) The ratio of frictional force to the normal reaction is constant for two given surfaces
  D) The limiting frictional force is independent of the area of surface in contact.
  E) Dynamic frictional force is independent of the relative velocity of the surfaces in contact.
  Show Answer
  The correct answer is B .
• Question 927:

  In the formation of sea breeze, wind blows from?

  Options:
  A) sky to land
  B) sea to sky
  C) land to sea
  D) sea to land
  Show Answer
  The correct answer is D .
• Question 928:

  I. Mass

  II. Density

  III. Temperature

  IV. Nature of substance

  Which of the above affect diffusion?

  Options:
  A) I and II only
  B) I,II and IV only
  C) II, III and IV only
  D) I, II, III and IV
  Show Answer
  The correct answer is B .
• Question 929: A weightless vessel of dimensions 4m x 3m x 2m is filled with a liquid of density 1000kgm^-3 and sealed. What is the maximum pressure this container can exert on a flat surface? [g = 10ms^-2] Options:
  A) 9 x 10⁴NM^-2
  B) 4 x 10⁴NM^-2
  C) 3 x 10⁴NM^-2
  D) 2 x 10⁴NM^-2
  Show Answer
  The correct answer is D .
• Question 930: 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 .