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 51:

  

  The wire X in the figure above is at right angles to the plane of the paper and carries a current into the paper. at which of the points labelled 1-4, will the magnetic flux density due to this current be in the same direction as that of the horizontal component of earth's magnetic field

  Options:
  A) 1
  B) 2
  C) 3
  D) 4
  Show Answer
  The correct answer is C .
• Question 52: A jet engine develops a thrust of 270Ns when the velocity of the exhaust gases relative to the engine is 300ms^-1. What is the mass of the material ejected per second? Options:
  A) 81.00kg
  B) 9.00kg
  C) 0.90kg
  D) 0.09kg
  Show Answer
  The correct answer is C .
• Question 53: The length of a displaced pendulum ball which passes its lowest point twice every seconds is [g = 10m^-2] Options:
  A) 0.25 m
  B) 0.45 m
  C) 0.58m
  D) 1.00m
  Show Answer
  The correct answer is A .
• Question 54: An engineer intends to deviate a light ray from its path by 120^o through reflection from a plane mirror. Calculate the angle of incidence Options:
  A) 60^o
  B) 40^o
  C) 30^o
  D) 20^o
  Show Answer
  The correct answer is C .
• Question 55: Change of state is accompanied by change of Options:
  A) temperature
  B) volume
  C) heat content
  D) temperatureb and volume
  E) volume and heat content
  Show Answer
  The correct answer is C .
• Question 56: The angle between the magnetic meridian and the geographic meridian at a locality on the earth is the Options:
  A) longitude of the locality
  B) angle of inclination at the locality
  C) latitude of the locality
  D) angle of declination of the locality
  Show Answer
  The correct answer is D .
• Question 57: If a charged ion goes through combined electric and magnetic fields, the resultant emergent velocity of the ion is Options:
  A) E/B
  B) EB
  C) B/E
  D) E - B
  Show Answer
  The correct answer is A .
• Question 58: A light wave of frequency 5 x 10¹⁴Hz moves through water which has a refractive index of $\frac{4}{3}$. Calculate the wavelength in water if the velocity of light in air is 3 x 10⁸ms^-1 Options:
  A) 4.5 x 10^-7m
  B) 6.0 x 10^-7m
  C) 1.7 x 10⁶m
  D) 2.2 x 10⁶m
  Show Answer
  The correct answer is A .
• Question 59: Which of the following is obtained when a magenta is mixed with green colour? Options:
  A) Yellow
  B) Blue
  C) White
  D) Red
  Show Answer
  The correct answer is C .
• Question 60: Which of the following statements is correct about light and sound waves? Both Options:
  A) are longitudinal waves
  B) are transverse waves
  C) have the same velocity in air
  D) need a medium for propagation
  E) transmit energy
  Show Answer
  The correct answer is E .