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 941: A narrow beam of white light can be split up into different colours by a glass prism. The correct explanation is that Options:
  A) white light is an electromagnetic wave
  B) the prism has all the colours of the white light
  C) white light has undergone total internal reflection in the prism
  D) different colours of white light travel with different speeds in glass
  E) white ligth consist of yellow, green and red colours
  Show Answer
  The correct answer is D .
• Question 942: The kinetic theory of photoelectron liberated from a metallic surface depends on the Options:
  A) intensity of the incident radiation
  B) time duration of the incident radiation
  C) temperature of the incident radiation
  D) frequency of the incident radiation
  Show Answer
  The correct answer is D .
• Question 943: A plane inclined at an angle of 30^o to the horizontal has an efficiency of 60%. The force parallel to the plane required to push a load of 120N uniformly up the plane is Options:
  A) 60N
  B) 100N
  C) 120N
  D) 200N
  E) 240N
  Show Answer
  The correct answer is B .
• Question 944:

  A cell gives a current of 0.15A through a resistance of 8$\mathrm{\Omega }$ and 0.3A. When the resistance is changed to 3$\mathrm{\Omega }$ the internal resistance of the cell is

  Options:
  A) 0.05$\mathrm{\Omega }$
  B) 1.00$\mathrm{\Omega }$
  C) 1.50$\mathrm{\Omega }$
  D) 2.00$\mathrm{\Omega }$
  E) 2.50$\mathrm{\Omega }$
  Show Answer
  The correct answer is D .
• Question 945: A transistor function mainly as a Options:
  A) switch and amplifier
  B) rectifier and an amplifier
  C) charge storer and an amplifier
  D) charge storer and a switch
  Show Answer
  The correct answer is A .
• Question 946:

  A piece of radioactive material contains 10²⁰ atoms.

  If the half life of the material is 20 seconds, the number of disintegration in the first second is

  Options:
  A) 3.47 x 10¹⁸
  B) 6.93 x 10 ²⁰
  C) 3.47 x 10²⁰
  D) 6.93 x 10¹⁸
  Show Answer
  The correct answer is A .
• Question 947: Which of the following phenomena explains the fact that a house whose roof is coated with white paint will be cooler in the hot season than one coated with black paint ? Options:
  A) conduction
  B) convection
  C) refraction
  D) reflection
  Show Answer
  The correct answer is D .
• Question 948:

  If the stress on a wire is 10${}^7$NM${}^{-2}$ and the wire is stretched from its original length of 10.00m to 10.05m. The young'smodulus of the wire is?

  Options:
  A) 5.0 x 10${}^{-4}$Nm${}^{-2}$
  B) 5.0 x 10${}^{-5}$Nm${}^{-2}$
  C) 2.0 x 10${}^{-8}$Nm${}^{-2}$
  D) 2.0 x 10${}^9$Nm${}^{-2}$
  Show Answer
  The correct answer is D .
• Question 949: Which of the following waves is both transverse and mechanical? Options:
  A) Water waves
  B) Radio waves
  C) Sound waves
  D) X-rays
  Show Answer
  The correct answer is A .
• Question 950: Under what conditions are cathode rays produced in a discharge tube? Options:
  A) High pressure and low voltage
  B) High pressure and high voltage
  C) Low pressure and low voltage
  D) Low pressure and high volatge
  Show Answer
  The correct answer is D .