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 861: A given quantity of heat increases the temperature of 150grams of water from 9^oC to 15^oC and increases the temperature of oil of 100grams from 9^oC to 25^oC. The ratio of the specific heat of oil to that of water is Options:
  A) 0.36
  B) 0.46
  C) 0.56
  D) 0.76
  E) 0.86
  Show Answer
  The correct answer is C .
• Question 862:

  In the molecular explanation of conduction, heat is transferred by the

  Options:
  A) Free electrons
  B) Free atoms
  C) Free molecules
  D) Free solids
  Show Answer
  The correct answer is A .
• Question 863:

  Heat may be transferred by conduction, convention and radiation. By which of these methods does heat travel through vacuum?

  Options:
  A) Conduction only
  B) Convection only
  C) Radiation only
  D) All these methods
  Show Answer
  The correct answer is C .
• Question 864: A light of energy 5eV falls on a metal and the electrons with a maximum kinetic energy of 2eV are ejected. The work function of the metal is Options:
  A) 0.4eV
  B) 2.5eV
  C) 3.0eV
  D) 7.0eV
  Show Answer
  The correct answer is C .
• Question 865: Which of the following has the lowest internal resistance when new? Options:
  A) leclanche cell
  B) Daniel cell
  C) Accumulator
  D) Torch battery
  Show Answer
  The correct answer is C .
• Question 866: The energy E of a photon and it's wavelength are related by Eλ = X. the numerical value of X is?
  [h = 6.63 x 10^-34js, c = 3 x 10⁸ ms^-1] Options:
  A) 6.6 X 10^-28
  B) 1.99 X 10^-27
  C) 6.60 x 10^-26
  D) 1.99 x 10^-25
  Show Answer
  The correct answer is D .
• Question 867: When white light is dispersed by a spectrometer, the component having the shortest wavelength is Options:
  A) orange
  B) green
  C) violet
  D) red
  Show Answer
  The correct answer is C .
• Question 868: An object placed on the principle axis of a convex lens of focal length 10m produces a real image of double magnification. The image distance from the lens is Options:
  A) 30cm
  B) 25cm
  C) 20cm
  D) 15cm
  E) 10cm
  Show Answer
  The correct answer is A .
• Question 869:

  Which of the following statement about the electromagnet shown above is correct?

  Options:
  A) when the current flows from A to B, the end A will be in north pole
  B) when the current flows from A to B, the end A will be south pole
  C) when the current flows from A to B, the end B will be north pole
  D) none of the above
  Show Answer
  The correct answer is B .
• Question 870: In a sound wave in air, the adjacent rarefactions and compressions are separated by a distance of 17cm. If the velocity of the sound wave is 340ms^-1. Determine the frequency Options:
  A) 10Hz
  B) 20Hz
  C) 1000Hz
  D) 5780Hz
  Show Answer
  The correct answer is C .