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 91:

  A car of mass 800kg attains a speed of 25m/s in 20secs. The power developed in the engine is?

  Options:
  A) 1.25 x 10${}^4$W
  B) 2.50x 10${}^4$W
  C) 1.25 x 10${}^6$W
  D) 2.50 x 10${}^6$W
  Show Answer
  The correct answer is A .
• Question 92: Which of the following is true of the loudness of sound? It Options:
  A) depends on the square of the amplitude of the vibrating body
  B) is proportional to the distance of the observer from the source of the sound
  C) is greatest in vacuum
  D) is dependent in vacuum
  Show Answer
  The correct answer is A .
• Question 93:

  

  What is the resultant resistance in the circuit given above?

  Options:
  A) 11Ω
  B) 8Ω
  C) 4Ω
  D) 3.6Ω
  E) 4.3Ω
  Show Answer
  The correct answer is B .
• Question 94: Which of the following machines does NOT apply the lever principle? Options:
  A) claw hammer
  B) wheel barrow
  C) single moving pulley
  D) sugartongs
  E) nutcrackers
  Show Answer
  The correct answer is C .
• Question 95: 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 .
• Question 96:

  The earth's gravitational field intensity at its surface is about

  (G = 6.7 × 10${}^{-11}$Nm${}^2$/kg${}^2$, mass of the earth is 6 × 10${}^{24}$kg, radius of the earth is 6.4 × 10${}^6$m, g on the earth = 9.8m/s${}^2$)

  Options:
  A) 6.7N/kg
  B) 7.9N/kg
  C) 8.0N/kg
  D) 9.8N/kg
  Show Answer
  The correct answer is D .
• Question 97: Rationalize $\frac{2\sqrt{3}}{+}\sqrt{5}\sqrt{5}-\sqrt{3}$ Options:
  A) 3√15 - 11
  B) $\frac{3\sqrt{15}-11}{2}$
  C) 3√15 + 11
  D) $\frac{3\sqrt{15}+11}{2}$
  Show Answer
  The correct answer is D .
• Question 98: The blade of a hoe feel colder to touch in the morning than the wooden handle because the Options:
  A) handle is a better conductor of heat than blade
  B) handle contains stored energy in form of heat
  C) blade is a better conductor of heat than the handle
  D) blade is placed at a lower temperature than the heat
  Show Answer
  The correct answer is C .
• Question 99: A concave mirror has a radius of curvature of 36cm. At what distance from the mirror should an object be placed to give a real image three times the size of the object? Options:
  A) 12cm
  B) 24cm
  C) 48cm
  D) 108cm
  Show Answer
  The correct answer is B .
• Question 100:

  

  In the circuit diagram of a transistor above, the terminal P, Q and R represent

  Options:
  A) EMITTER, BASE and COLLECTOR
  B) COLLECTOR, EMITTER and BASE
  C) BASE, COLLECTOR and EMITTER
  D) BASE, ENITTER and COLLECTOR
  Show Answer
  The correct answer is A .