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 421:

  A simple pendulum, has a period of 5.77 seconds. When the pendulum is shortened by 3 m, the period is 4.60 seconds. Calculate the new length of the pendulum

  Options:
  A) 5.23 m
  B) 6.42 m
  C) 4.87 m
  D) 7.26 m
  Show Answer
  The correct answer is A .
• Question 422: The small droplets of water that form on the grass in the early hours of the morning is Options:
  A) Fog
  B) Haul
  C) Mist
  D) Dew
  Show Answer
  The correct answer is D .
• Question 423: The S.I unit of moment of a force is Options:
  A) kgm
  B) µm
  C) Jm
  D) µm${}^{-1}$
  Show Answer
  The correct answer is B .
• Question 424: In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that Options:
  A) a gold nucleus contains protons, neutrons and electrons uniformly distributed in a tiny volume
  B) the gold nucleus is positively charged and is concentrated in a tiny volume
  C) the gold nucleus emitted alpha particles
  D) the gold nucleus is concentrated in a tiny volume and contains alpha particles
  Show Answer
  The correct answer is B .
• Question 425: A platinum resistance thermometer records 3.0$\mathrm{\Omega }$ at 0^oC and 8.0$\mathrm{\Omega }$ at 100^oC. If it records 6.0$\mathrm{\Omega }$ in a certain environment, The temperature of the medium is Options:
  A) 80^oC
  B) 60^oC
  C) 50^oC
  D) 30^oC
  Show Answer
  The correct answer is B .
• Question 426:

  A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms${}^{-1}$ from the top of a tower 10m high. Neglecting air resistance, its total energyjust before hitting the ground is? (Take g = 10ms${}^{-2}$)

  Options:
  A) 5J
  B) 10J
  C) 15J
  D) 20J
  Show Answer
  The correct answer is C .
• Question 427: Which of the following is NOT a vector quantity? Options:
  A) Force
  B) Altitude
  C) weight
  D) Displacement
  E) Acceleration
  Show Answer
  The correct answer is B .
• Question 428:

  

  In the diagram above, a ray of light passes from glass into air, if the angle of incidence in glass is $\alpha$ and angle of refraction in air is $\beta$ which of following statements is true???

  Options:
  A) $\alpha =\beta$
  B) the efractive index of glass is $\frac{sin\theta }{sin\alpha }$
  C) The ray suffers total internal reflection if $\beta$ is greater than the critical angle
  D) the refractive index of glass is $\frac{sin\alpha }{sin\beta }$
  Show Answer
  The correct answer is D .
• Question 429: At different locations on the earth's surface, the earth's magnetic field is Options:
  A) the same in magnitude and direction
  B) the same in magnitude but different in direction
  C) different in both magnitude and direction
  D) different in magnitude but different in direction
  Show Answer
  The correct answer is A .
• Question 430: a force of 16N applied 4.0kg block that is at rest on a smooth, horizontal surface. What is the velocity of the block at t = 5 seconds? Options:
  A) 4ms^-1
  B) 10ms^-1
  C) 20ms^-1
  D) 50ms^-1
  E) 80ms^-1
  Show Answer
  The correct answer is C .