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 1771: A mass of a liquid at 30^oC is mixed with a mass of the same liquid at 70^oC and the temperature of the mixture is 45^oC. Find the ratio of the mass of the cold liquid to the mass of the other liquid. Options:
  A) 3 : 5
  B) 5 : 3
  C) 3 : 7
  D) 7 : 3
  Show Answer
  The correct answer is B .
• Question 1772: What is the equivalent of 20K in Celsius scale? Options:
  A) 20^oC
  B) 293^oC
  C) 68^oC
  D) 36^oC
  Show Answer
  The correct answer is B .
• Question 1773: During a thunderstorm, the sound is heard over a long time. this phenomenon is referred to as Options:
  A) diffraction of sound
  B) refraction of sound
  C) superposition
  D) reveraberation
  Show Answer
  The correct answer is D .
• Question 1774: Which of the following is a vector? Options:
  A) Electric charge
  B) Electric field
  C) Electrical potential difference
  D) Electrical capacitance
  Show Answer
  The correct answer is B .
• Question 1775: The count rate of a radioactive material is 800 count/min. If the half-life of the material is 4 days, what would the count rate be in 16 days later Options:
  A) 200 count / min
  B) 100 count / min
  C) 50 count / min
  D) 25 count / min
  Show Answer
  The correct answer is C .
• Question 1776: A 120 V, 60 W lamp is to be operated on 220 V a.c. the supply mains. calculate the values of non-inductive resistance that would be required to ensure that the lamp is run on current value. Options:
  A) 100 Ω
  B) 200 Ω
  C) 300 Ω
  D) 500 Ω
  Show Answer
  The correct answer is B .
• Question 1777:

  A man walks 8km north and then 5km in a direction 60^o east of north. Find the distance from his starting point

  Options:
  A) 11.36km
  B) 12.36km
  C) 13.00km
  D) 14.36km
  Show Answer
  The correct answer is A .
• Question 1778:

  In a slide wire bridge, the balance is obtained at a point 25cm from one end of wire 1m long. The resistance to be tested is connected to that end and a standard resistance of 3.6$\mathrm{\Omega }$ is connected to the other end of the wire. Determine the value of the unknown resistance

  Options:
  A) 3.2$\mathrm{\Omega }$
  B) 1.4$\mathrm{\Omega }$
  C) 3.21$\mathrm{\Omega }$
  D) 1.2$\mathrm{\Omega }$
  Show Answer
  The correct answer is D .
• Question 1779: The total energy required to send a unit positive charge round a complete electrical circuit is the Options:
  A) kinetic energy
  B) potential difference
  C) electromotive force
  D) electrical energy
  Show Answer
  The correct answer is B .
• Question 1780: The melting point of naphthalene is 78^oC. What is this temperature in kelvin Options:
  A) 100k
  B) 351k
  C) 378k
  D) 444k
  Show Answer
  The correct answer is B .