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: For semi conductor to have negative temperature coefficient of resistance implies that Options:
  A) their resistance decrease with temperature
  B) The resistance increase with temperature
  C) their resistance is constantly changing with temperature
  D) they have electrons and holes at high temperature
  Show Answer
  The correct answer is A .
• Question 22:

  

  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 23:

  The force exerted on a charged body in an electric field depends on I. the charge on the body

  II. the electric field intensity

  III. the square of the mass of the body

  Options:
  A) I only
  B) II only
  C) I and II only
  D) I and III only
  E) II and III only
  Show Answer
  The correct answer is C .
• Question 24:

  The sensitivity of a thermometer is

  Options:
  A) All of the above
  B) how quickly a temperature change can be detected
  C) the difference between the maximum and the minimum temperature
  D) the smallest temperature change that can be detected or measured
  Show Answer
  The correct answer is D .
• Question 25: Which of the following arrangements in the sequence shown can be used to obtain a pure spectrum of white light? Options:
  A) source, slit, converging lens, prism, converging lens, screen.
  B) source, slit, diverging lens, prism, diverging lens, screen.
  C) source, converging lens, prism, diverging lens, screen.
  D) source, slit, prism, diverging lens, converging lens, screen.
  E) source, slit, prism, diverging lens, sreen.
  Show Answer
  The correct answer is A .
• Question 26: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 27: 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 28: Lodestone is a natural magnet, it points at Options:
  A) N – W when suspended freely
  B) N–S when suspended freely
  C) S – E when suspended freely
  D) S–W when suspended freely
  Show Answer
  The correct answer is B .
• Question 29: 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 30: The unit of inductance is Options:
  A) Weber
  B) Telsa
  C) Hertz
  D) Henry
  E) Farad
  Show Answer
  The correct answer is D .