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 21:

  

  The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct

  Options:
  A) The solid will fall over if the vertical line through G lies outside the base
  B) The solid will fall over if the vertical line through lies inside the base
  C) The solid will not fall over if the vertical line through G lies outside the base
  D) The solid can never fall over
  Show Answer
  The correct answer is A .
• Question 22: When a known standard resistor of 2$\mathrm{\Omega }$ is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor? Options:
  A) 1.10$\mathrm{\Omega }$
  B) 1.64$\mathrm{\Omega }$
  C) 2.44$\mathrm{\Omega }$
  D) 27.50$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 23: An object placed 10cm from a concave mirror of focal length 5cm would have its image Options:
  A) at the centre of convature
  B) at the radius of curvature
  C) at infinity
  D) 10 cm from the focus
  Show Answer
  The correct answer is A .
• Question 24:

  Electrons were discovered by

  Options:
  A) Dalton
  B) James Charwick
  C) J.J. Thompson
  D) Niels Bohr
  Show Answer
  The correct answer is C .
• Question 25: If light with photon energy 2eV is incident suitably on the surface of a metal with work function 3eV, then Options:
  A) no electron will be emitted
  B) the few electrons emitted will have a maximum kinetic energy of 1eV
  C) the few electrons emitted will have a maximum kinetic energy of 3eV
  D) many electrons will be emitted
  Show Answer
  The correct answer is A .
• Question 26: The displacement d produced in a glass block of thickness t and refractive index n when an object is viewed through it is Options:
  A) t – n
  B) t (1 + 1/n)
  C) t (1-1/n)
  D) t (1/n - 1)
  Show Answer
  The correct answer is C .
• Question 27: Which of the following statements about sound is NOT true? Options:
  A) sound is a longitudinal wave
  B) sound can be reflected and refracted like light
  C) sound travels through a vacuum
  D) sound moves faster in a steel wire than in air
  E) sound can ony be produced by vibrating objects
  Show Answer
  The correct answer is C .
• Question 28:

  

  The air column as shown above is set into vibration by the turning fork. In this State of resonance, the waves in the air column will be

  Options:
  A) stationary and transverse
  B) stationary and longitudinal
  C) progressive and transverse
  D) progressive and longitudinal
  Show Answer
  The correct answer is B .
• Question 29: A metal cube of volume 10³mm³ is lowered into a measuring cylinder containing water. If the internal cross-sectional area of the cylinder is 1.5 x 10²mm², by how much does the water level rise in the cylinder? Options:
  A) 6.67 x 10⁰mm
  B) 8.50 x 10²mm
  C) 1.15 x 10³mm
  D) 2.50 x 10³mm
  E) 1.50 x 10⁵mm
  Show Answer
  The correct answer is A .
• Question 30:

  A train has an initial velocity of 44m/s and an acceleration of -4m/s${}^2$. Calculate its velocity after 10 seconds

  Options:
  A) 10m/s
  B) 6m/s
  C) 8m/s
  D) 4m/s
  Show Answer
  The correct answer is D .