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 171: A certain far - sighted person cannot see object that are closer to the eye than 50 cm clearly. Determine the power of the converging lens which will enable him to see at 25 cm Options:
  A) 0.06 D
  B) 0.02 D
  C) 0.03 D
  D) 0.04 D
  E) no option is correct
  Show Answer
  The correct answer is E .
• Question 172:

  

  Which of the following bodies, each with centre of gravity G, lying on a horizontal table, is/are in unstable equilibrium?

  Options:
  A) II only
  B) III only
  C) I and IV only
  D) II and III only
  Show Answer
  The correct answer is B .
• Question 173: 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 .
• Question 174:

  A force of 200N acts between two objects at a certain distance apart. The value of the force when the distance is halved is

  Options:
  A) 400N
  B) 200N
  C) 100N
  D) 800N
  Show Answer
  The correct answer is D .
• Question 175: In order to find the depth of the sea, a ship sends out a sound wave and receives an echo after one second. If the velocity of sound in water is 1500ms^-1, what is the depth of the sea? Options:
  A) 0.75km
  B) 1.50km
  C) 2.20km
  D) 3.00km
  E) 3.75km
  Show Answer
  The correct answer is A .
• Question 176: The sound of an electricity bell dies down slowly when air is slowly pumped out from a bottle because Options:
  A) the wavelength of sound becomes greater in the bottle
  B) sound cannot pass through the bottle
  C) sound needs a material medium
  D) sound can pass through a vacuum
  Show Answer
  The correct answer is C .
• Question 177: Under which of the following conditions is work done? Options:
  A) A man supports a heavy food above his head with his hands
  B) A boy climbs onto a table
  C) A man pushes unto a table
  D) A woman holds a pot of water
  Show Answer
  The correct answer is C .
• Question 178: To produce an enlarged and erect image with a concave mirror,the object must be positioned Options:
  A) at the principal focus
  B) beyond the centre of curvature
  C) between the principal focus and the centre of the curvature
  D) between the principal focus and the pole
  Show Answer
  The correct answer is D .
• Question 179:

  An astronomical telescope is said to be in normal adjustment when the?

  Options:
  A) eye is accommodated
  B) focal length of an object lens is longer than that of eye piece
  C) final image is at the near point of eye
  D) final image is at infinity
  Show Answer
  The correct answer is D .
• Question 180: What happens when a gas expands at constant temperature? Options:
  A) its pressure decreases
  B) the total momentum of its molecules remains constant
  C) its pressure decreases and the total momentum of its moleculees remains constant
  D) its pressure decreses and the total kinetic energy of its molecule decreases
  Show Answer
  The correct answer is A .