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 2121: The total length of a spring when a mass of 20g is hung from its end is 14cm, while its total length is 16cm when a mass of 30g is hung from the same end. Calculate the unstretched length of the spring assuming Hooke's law is obeyed. Options:
  A) 9.33cm
  B) 10.00cm
  C) 10.66cm
  D) 12.00cm
  E) 15.00cm
  Show Answer
  The correct answer is B .
• Question 2122: Total internal reflection will not occur when light travels from Options:
  A) water to air
  B) water into glass
  C) glass to air
  D) glass into water
  Show Answer
  The correct answer is B .
• Question 2123: An electron makes a transition from a certain energy level E_k to the ground state E₀. If the frequency of emission is 8.0 x 10¹⁴Hz The energy emitted is Options:
  A) 8.25 x 10^-19J
  B) 5.28 x 10^-19J
  C) 5.28 x 10¹⁹J
  D) 8.25 x 10¹⁹J
  Show Answer
  The correct answer is B .
• Question 2124: The heat from the sun reaches the earth by the process Options:
  A) insulation
  B) precipitation
  C) conduction
  D) convection
  E) radiation
  Show Answer
  The correct answer is E .
• Question 2125: A motor vehicle is brought to rest from a speed of 15ms^-1 in 20 seconds. Calculate the retardation. Options:
  A) 0.75ms^-1
  B) 1.33ms^-2
  C) 5.00ms^-2
  D) 7.50ms^-2
  Show Answer
  The correct answer is A .
• Question 2126:

  

  In the diagram above , the current I is

  Options:
  A) ³/₈
  B) ⁹/₁₁
  C) ¹¹/₉
  D) ⁸/₃
  Show Answer
  The correct answer is B .
• Question 2127: The fundamental frequency of a plucked wire under a tension of 400N is 250Hz. When the frequency is changed to 500 Hz at constant length, the tension is Options:
  A) 1600N
  B) 400N
  C) 160N
  D) 40N
  Show Answer
  The correct answer is A .
• Question 2128: A boy in a barber's shop sits between two parallel mirrors. The number of images observed by him will be Options:
  A) Infinite
  B) Ten
  C) Eight
  D) Forty
  Show Answer
  The correct answer is A .
• Question 2129: Which of the following methods CANNOT be used to produce a steel magnet? The Options:
  A) passing of an electric current through a solenoid
  B) repeated stroking of the specimen with a magnet
  C) repeated stroking of the specimen in opposite directions with magnets
  D) heating of the specimen
  E) hammering of the specimen in the earth's magnetic field
  Show Answer
  The correct answer is D .
• Question 2130: A man standing between two parallel mirrors in a barber's shop will see the following number of his own image Options:
  A) eight
  B) two
  C) four
  D) one
  E) infinite
  Show Answer
  The correct answer is E .