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 191: If an object is placed between two parallel plane mirrors with their reflecting surfaces facing each other, how many images of the object will be formed? Options:
  A) Infinite
  B) Eight
  C) Four
  D) Two
  Show Answer
  The correct answer is A .
• Question 192:

  The vapour pressure?

  Options:
  A) increases non-linearly with measuring temperature
  B) increases linearly with increasing temperature
  C) decreases linearly with increasing temperature
  D) decreases non-linearly ith measuring temperature
  Show Answer
  The correct answer is A .
• Question 193: If the refractive index of a medium is V2, what is the critical angle? Options:
  A) 45^o
  B) 50^o12'
  C) 56^o25'
  D) 75^o
  E) 90^o
  Show Answer
  The correct answer is A .
• Question 194: When a red rose flower is observed in blue light, what colour does the observer see? Options:
  A) Red
  B) Blue
  C) Magenta
  D) yellow
  E) No correct option
  Show Answer
  The correct answer is E .
• Question 195: The angle of deviation of light of various colours passing through a triangular prism increases in the order Options:
  A) red → green → blue
  B) green → violet → blue
  C) blue → red → green
  D) blue → green → red
  Show Answer
  The correct answer is A .
• Question 196:

  I. Wavelength

  II. Medium of propagation

  III. Wave velocity

  IV. Frequency

  V. Energy

  Which of the above are used for characterizing waves?

  Options:
  A) I, II and V
  B) I and IV
  C) I, III and IV
  D) III, IV and V
  Show Answer
  The correct answer is C .
• Question 197: Which of the following substances undergoes sublimation? Options:
  A) Ether
  B) Ice
  C) Iodine
  D) Naphthalene
  E) Turpentine
  Show Answer
  The correct answer is D .
• Question 198:

  

  Fig 4 represents a block-and-tackle pulley system on which an effort of W newtons supports a load of 120.0N if the efficiency of the system is 40% then the value of W is

  Options:
  A) 28.0N
  B) 48.0N
  C) 50.0N
  D) 288.0N
  Show Answer
  The correct answer is C .
• Question 199: A 5kg block is released from rest on a smooth plane inclined at an angle of 30^o to the horizontal. What is the acceleration down the plane? [g = 10ms^-2] Options:
  A) 5.0 ms^-2
  B) 5.8 ms^-2
  C) 8.7 ms^-2
  D) 25.0 ms^-2
  Show Answer
  The correct answer is A .
• Question 200:

  Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss;

  Specific heat capacity of copper = 400JKg^-1K^-1

  Latent heat of fusion of ice = 3.3 x 10⁵JKg^-1

  Options:
  A) 8/33kg
  B) 33/80kg
  C) 80/33kg
  D) 33/8kg
  Show Answer
  The correct answer is A .