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 911: 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 912: The particles emitted when ${}_{19}^{39}K{\text{ decay to }}_{19}^{39}K$ is Options:
  A) gamma
  B) beta
  C) electron
  D) alpha
  Show Answer
  The correct answer is A .
• Question 913: In a simple pendulum experiment, a boy observed that the times for 30 oscillations are 70.0s, 72.0s and 67.0s respectively. Calculate the mean period of oscillation of the pendulum. Options:
  A) 0.14s
  B) 0.43s
  C) 2.32s
  D) 2.40s
  E) 6.97s
  Show Answer
  The correct answer is C .
• Question 914: An electric current of 3Aflowing through an electric heating elements of resistance 20 embedded in 1,000g of an oil raises the temperature of the oil by 10^oC in 10 seconds then the specific heat capacity of the oil is Options:
  A) 1.8Jg^-1oC
  B) 0.6Jg^-1oC
  C) 0.18Jg^-1oC
  D) 18Jg^-1oC
  E) 0.06Jg^-1oC
  Show Answer
  The correct answer is C .
• Question 915: The unit of moment of a couple can be expressed in? Options:
  A) N m^-1
  B) N m^-2
  C) N m
  D) N m²
  Show Answer
  The correct answer is C .
• Question 916: If the Nigeria flag (green, white, green) is viewed in pure yellow light, which of the following set of colours would be observed on the flag? Options:
  A) Green, yellow, green
  B) Red, yellow, red
  C) black, yellow, black
  D) Green, white, green
  Show Answer
  The correct answer is A .
• Question 917: I. Refraction II. Interference III. Diffraction Which of the above properties are common to all waves? Options:
  A) II and III only
  B) I, II and III
  C) I and II only
  D) I and III only
  Show Answer
  The correct answer is B .
• Question 918:

  When the downward current flows in a straight vertical conductor, the direction of its magnetic field at a point due north of the wire is

  Options:
  A) Upward
  B) North
  C) South
  D) West
  Show Answer
  The correct answer is D .
• Question 919: The equation P^xV^yT^z = Constant is Charles’ law if Options:
  A) x = 0, y = 1 and z = -1
  B) x = 0, y = -1 and z = 1
  C) x = 1, y = 1 and z = 0
  D) x = 1, y = 1 and z = -1
  E) x = 1, y = 1 and z = 1
  Show Answer
  The correct answer is A .
• Question 920:

  The limiting frictional force between two surface depends on

  I. the normal reaction between the surfaces

  II. the area of surface in contact

  III. the relative velocity between the surfaces

  IV. the nature of the surface

  Options:
  A) I only
  B) I and IV only
  C) II only
  D) III only
  Show Answer
  The correct answer is B .