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 31: In a certain fusion reaction, a deuteron (${}_1^{2}H$) interacts with a triton (${}_1^{3}He$) and produces an a-particle (${}_2^{4}He$) and a second product. The second product is Options:
  A) a proton
  B) an electron
  C) a neutron
  D) a gamma ray
  Show Answer
  The correct answer is C .
• Question 32:

  

  The figure above shows displacement-time graphs for three different motions. which of the following statements is correct

  Options:
  A) graph 2 corresponds to the highest velocity
  B) graph 1 corresponds to zero gravity
  C) graph 3 corresponds to a particle moving in the negative x direction
  D) graph 2 corresponds to a particle moving in the positive x direction
  Show Answer
  The correct answer is D .
• Question 33:

  

  The value of the series resistor required to convert the above galvanometer into a voltmeter with a full range deflection of 15V is

  Options:
  A) 985 ohms
  B) 990 ohms
  C) 995 ohms
  D) 1000 ohms
  E) 1005 ohms
  Show Answer
  The correct answer is C .
• Question 34: A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the velocity of sound in air if the cliff is 680m away? Options:
  A) 170ms^-1
  B) 136ms^-1
  C) 340ms^-1
  D) 680ms^-1
  E) 510ms^-1
  Show Answer
  The correct answer is C .
• Question 35: The percentage of the original nuclei of the sample of a radioactive substance left after 5 half - lives is Options:
  A) 8%
  B) 5%
  C) 3%
  D) 1%
  Show Answer
  The correct answer is C .
• Question 36: Which of the following properties is/are common to all waves? i. Diffraction ii. Refraction iii. Interference Options:
  A) i only
  B) ii only
  C) ii and iii
  D) i, ii, and iii
  Show Answer
  The correct answer is D .
• Question 37:

  Which of the following may be used to explain a mirage?

  I. Layers of air near the road surface have varying refractive indices in hot weather

  II. Road surfaces sometimes become good reflectors in hot weather

  III. Light from the sky can be reflected upwards after coming close to the road surface.

  Options:
  A) I and III only
  B) II and III only
  C) II only
  D) I, II and III
  Show Answer
  The correct answer is A .
• Question 38: 250g of lead at 170^oC is dropped into 100g of water at 0^oC. If the final temperature is 12^oC, the specific heat of lead is (specific heat of water is 4,200J/kg^oC) Options:
  A) 39.5J/kg^oC
  B) 50.4J/kg^oC
  C) 127.6J/kg^oC
  D) 154.6J/kg^oC
  E) 173.4J/kg^oC
  Show Answer
  The correct answer is C .
• Question 39: The charge carriers in gasses are Options:
  A) ions only
  B) electrons and ions
  C) electrons and holes
  D) electrons only
  Show Answer
  The correct answer is A .
• Question 40: The distance xm travelled by a particle in time t seconds is described by the equation x = 10 + 12t², Find the average speed of the particle between the time interval t = 2s and t = 5s Options:
  A) 60 ms^-1
  B) 72 ms^-1
  C) 84 ms^-1
  D) 108 ms^-1
  Show Answer
  The correct answer is B .