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 141: Which of the following phenomena CANNOT be explained by the molecular theory of matter? Options:
  A) Expansion
  B) Conduction
  C) Convection
  D) Radiation
  E) Evaporation
  Show Answer
  The correct answer is D .
• Question 142: A rectangular tank contains water to a depth of 2m, if the base is 4m x 3m, calculate the force on the base (Density of water = 10³kgm^-3, g = 10ms^-2) Options:
  A) 1.4 x 10²N
  B) 24 x 10⁴N
  C) 2.0 x 10⁴N
  D) 1.7 x 10³N
  Show Answer
  The correct answer is B .
• Question 143:

  Which of the following may be used to explain a mirage?

  I. Layers of air near the road surface have varying refractive indices in hot weather

  II. Road surfaces sometimes become good reflectors in hot weather

  III. Light from the sky can be reflected upwards after coming close to the road surface.

  Options:
  A) I and III only
  B) II and III only
  C) II only
  D) I, II and III
  Show Answer
  The correct answer is A .
• Question 144: A transverse wave and a longitudinal wave travelling in the same direction in a medium differ essentially in their Options:
  A) frequency
  B) amplitude
  C) direction of vibration of the particles of the medium
  D) period of vibration of the particles of the medium
  Show Answer
  The correct answer is C .
• Question 145:

  Two bodies have masses in the ratio3:1. They experience forces whichimpart to them,acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced

  Options:
  A) 1:4
  B) 2:1
  C) 2:3
  D) 2:5
  Show Answer
  The correct answer is C .
• Question 146:

  An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?

  Options:
  A) 3 days
  B) 2 days
  C) 1 day
  D) 4 days
  Show Answer
  The correct answer is B .
• Question 147: A 40-W instrument has a resistance of 90$\mathrm{\Omega }$. On what voltage should it be operated normally? Options:
  A) 60V
  B) 150V
  C) 225V
  D) 3600V
  Show Answer
  The correct answer is A .
• Question 148:

  

  A body of mass 40kg is being dragged along the floor by a rope inclined at 60 degrees to the horizontal. The frictional force between the box and the floor is 100N and the tension on the rope is 300N. How much work is done by dragging the box for a distance of 4m

  Options:
  A) 680J
  B) 400J
  C) 200J
  D) 100J
  Show Answer
  The correct answer is C .
• Question 149:

  When two objects A and B are supplied with the same quantity of heat, the temperature change in A is obtained to be twice that of B. The mass of P is half that of Q. The ratio of the specific heat capacity of A to B is

  Options:
  A) 1 : 4
  B) 4 : 1
  C) 1 : 1
  D) 2 : 1
  Show Answer
  The correct answer is C .
• Question 150: Which of the following correctly describes the energy changes in the generation of light by a hydroelectric power station? Options:
  A) Electrical $\to$ mechanical $\to$ potential
  B) potential $\to$mechanical $\to$electrical $\to$ light
  C) mechanical $\to$ sound $\to$ electrical $\to$ light
  D) kinetic $\to$ mechanical $\to$ electrical $\to$light
  Show Answer
  The correct answer is B .