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 2281: The energy contained in a wire when it extended by 0.02m by a force 500 N is Options:
  A) 5J
  B) 10J
  C) 10³J
  D) 10⁴
  Show Answer
  The correct answer is A .
• Question 2282: Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp? Options:
  A) heat $\to$ light $\to$ sound $\to$ kinetic
  B) kinetic $\to$ light $\to$ heat $\to$ electricity
  C) heat $\to$ kinetic$\to$ electricity $\to$ heat $\to$ light
  D) electricity $\to$ kinetic $\to$ heat v light
  E) heat $\to$ sound $\to$ kninetic v electricity
  Show Answer
  The correct answer is C .
• Question 2283: Find the work done in moving a 2 C charge between two points X and Y in an electric field if the potential difference is 100 volts Options:
  A) 50J
  B) 100J
  C) 200J
  D) 400J
  Show Answer
  The correct answer is C .
• Question 2284:

  A machine gun with a mass of 5kg fires a 50g bullet at a speed of 100 ms${}^{-1}$. The recoil speed of the machine gun is

  Options:
  A) 0.5 ms${}^{-1}$
  B) 1.5 ms${}^{-1}$
  C) 1 ms${}^{-1}$
  D) 2ms${}^{-}1$
  Show Answer
  The correct answer is C .
• Question 2285: Which of the following can be described as high tension transmission? Options:
  A) high resistance and low voltage
  B) low current and high voltage
  C) high current and low voltage
  D) high voltage and zero current
  E) high current and low resistance
  Show Answer
  The correct answer is B .
• Question 2286:

  

  The correct position for a fuse in the diagram above is

  Options:
  A) between P and Q
  B) Q
  C) S
  D) P
  Show Answer
  The correct answer is D .
• Question 2287: The activity of a radioactive substance depends on Options:
  A) temperature and purity
  B) temperature and age
  C) purity and age
  D) age, purity and temperature
  E) none of the above
  Show Answer
  The correct answer is E .
• Question 2288: The iron core of an induction coil is made from bundles of wire so as to Options:
  A) minimize eddy-currents
  B) generate eddy-current
  C) prevent sparking at the contact breaker
  D) get the greatest posible secondary voltage
  Show Answer
  The correct answer is A .
• Question 2289: Which of the following statements is (are) NOT true about the emission of the photoelectrons from metallic surfaces? i. all metallic surfaces emits the same number of photoelectrons in a given light ii. most metallic surfaces emit the same number of photoelectrons in visible and infra-red light iii. a metallic surface emits photoelectrons only if the frequency of the incident light is higher than its own characteristics threshold frequency Options:
  A) i only
  B) ii only
  C) i and ii
  D) ii and iii
  E) iii only
  Show Answer
  The correct answer is E .
• Question 2290:
  

  The diagram above illustrates the penetrating power of some types of radiation. X, Y and Z are likely

  Options:
  A) X = α-particle; Y = γ-ray; Z = β-particle
  B) X = α-particle; Y = β-particle; Z = γ-ray
  C) X = γ-ray; Y = α-particle; Z = β-particle
  D) X = β-particle; Y = γ-ray; Z = α-particle
  Show Answer
  The correct answer is C .