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 1131: The colours seen in the thin films of oil on the road and in soap bubbles are due to Options:
  A) reflection
  B) interference
  C) diffraction
  D) polarization
  Show Answer
  The correct answer is A .
• Question 1132:

  

  The diagram above shows two vectors at right angles to each other. The value of the resultant vector is

  Options:
  A) 14.0 N
  B) 10.0 N
  C) 12.0 N
  D) 13.0 N
  Show Answer
  The correct answer is B .
• Question 1133: The speed of sound in air at sea-level is 340ms^-1 while that of light is 300 000kms^-1. How far (to the nearest meter) from the center of a thunderstorm is an observer who hears a thunder 2s after a lightening flash? Options:
  A) 170ms^-1
  B) 340ms^-1
  C) 600ms^-1
  D) 680ms^-1
  Show Answer
  The correct answer is D .
• Question 1134: When impurities are added to semi-conductors, the conductivity of the semi-conductor Options:
  A) increases then decreases
  B) increases
  C) decreases
  D) remains constant
  Show Answer
  The correct answer is B .
• Question 1135: A thin wire with heavy weights attached to both ends is hung over a block of ice resting on two supports. If the wire cuts through the ice block while the block remains solid behind the wire, the process is called Options:
  A) condensation
  B) sublimation
  C) regelation
  D) fusion
  Show Answer
  The correct answer is C .
• Question 1136: Which of the following factors affects the speed of sound in air? i. Temperature ii. pressure iii. Frequency Options:
  A) i only
  B) ii only
  C) i and ii only
  D) ii and iii only
  Show Answer
  The correct answer is C .
• Question 1137:

  Which of the following statements is not true?

  Options:
  A) The mechanical advantage of a smooth inclined plane depends on the ratio of the length to the height of the plane.
  B) The efficiency of an inclined plane decreases as the slope increases.
  C) The effort required to push a given load up an inclined plane increases as the slope increases.
  D) As the slope of an inclined plane increases, the velocity ratio decreases.
  Show Answer
  The correct answer is A .
• Question 1138:

  

  In the figure above, a lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 20m from the load. what minimum force F must be applied at the end of the lever [g = 10ms^-2]

  Options:
  A) 9N
  B) 18N
  C) 20N
  D) 200N
  Show Answer
  The correct answer is D .
• Question 1139: A quantity of water at 0°C is heated to about 30°C. At each degree rise in temperature, its density will Options:
  A) rise steadily
  B) fall steadily
  C) fall then rise
  D) rise then fall
  Show Answer
  The correct answer is D .
• Question 1140: Calculate the force acting on an electron of charge 1.5 x 10^-19C placed in an electric field of intensity 10⁵Vm^-1 Options:
  A) 1.5x10^-11N
  B) 1.5x10^-12N
  C) 1.5x10^-13N
  D) 1.5x10^-14N
  Show Answer
  The correct answer is D .