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 21: One of the most important applications of bi-metallic strip is found in the construction of Options:
  A) a thermostat
  B) an altimeter
  C) a thermocouple
  D) a hydrometer
  Show Answer
  The correct answer is A .
• Question 22: in a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively, what is the voltage across the capacitor? Options:
  A) 30V
  B) 40V
  C) 50V
  D) 70V
  Show Answer
  The correct answer is B .
• Question 23: Non-luminous object can be seen because they Options:
  A) reflect light
  B) are near
  C) are polished
  D) emit light
  Show Answer
  The correct answer is A .
• Question 24: Calculate the angle of minimum deviation for a ray which is refracted through an equiangular prism of refractive index 1.4 Options:
  A) 60⁰
  B) 29⁰
  C) 99⁰
  D) 90⁰
  Show Answer
  The correct answer is B .
• Question 25: If the distance between two stationary charged particle is doubled, the magnitude of the electro-static force between them will be Options:
  A) doubled
  B) halved
  C) a quarter of its former value
  D) unchanged
  E) four times the original value
  Show Answer
  The correct answer is C .
• Question 26:

  A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?

  Options:
  A) 2400 J
  B) 9600 J
  C) 1500 J
  D) 1200 J
  Show Answer
  The correct answer is A .
• Question 27: What precaution should a manufacturer take to ensure that energy loss in a transformer is minimized? Options:
  A) the winding of the transformer should be made of high resistance wire
  B) the core should be made of thin sheets of metal
  C) no magnetic material should be used to make the core
  D) the flux linking the primary with the secondary coils should be minimum
  Show Answer
  The correct answer is B .
• Question 28: Which of the following statements supports the assumption that light travels in straight lines? Options:
  A) light can be diffracted
  B) a source of light produces distinct shadows of opaque objects
  C) a source of light produces interference patterns on a suitably placed screen
  D) light can be reflected
  Show Answer
  The correct answer is B .
• Question 29:

  A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. Calculate the frequency and wavelength in air of the note produced (take v = 350m/s)

  Options:
  A) 0.875m
  B) 0.625m
  C) 0.335m
  D) 0.125m
  Show Answer
  The correct answer is A .
• Question 30: The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is Options:
  A) covection
  B) conduction
  C) radiation
  D) diffusion
  Show Answer
  The correct answer is B .