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 1241: The latent heat of fusion of a substance is the heat required to Options:
  A) raise the temperature of unit mass of the substance by 1 ^oC
  B) maintain unit mass of the substance at constant temperature
  C) change unit mass of substance from solid to liquid at constant temperature
  D) change unit mass of liquid to vapour at constant temperature
  E) raise the temperature of unit mass by 100^oC
  Show Answer
  The correct answer is C .
• Question 1242: Which of the following statements defines correctly the efficiency of a machine? Options:
  A) the load carried by the machine divided by effort required in carrying the load
  B) the distance moved by the load divided by the distance moved by the effort
  C) the useful work done by the machine divided by the total work put into the machine
  D) the movement of the load divided by the movement of the effort about the same point
  E) the temperature at the end of the application of the machine divided by the initial temperature
  Show Answer
  The correct answer is C .
• Question 1243:

  A carstarts from rest and covers a distance of 40 m in 10 s. Calculatethe magnitude of its acceleration

  Options:
  A) 3.20 ms${}^{-2}$
  B) 0.25 ms${}^{-2}$
  C) 0.80 ms${}^{-2}$
  D) 4.00 ms${}^{-2}$
  Show Answer
  The correct answer is C .
• Question 1244: The wavelength of the first overtone of a note in a closed pipe of length 33 cm is? Options:
  A) 33 cm
  B) 44 cm
  C) 22 cm
  D) 17 cm
  Show Answer
  The correct answer is B .
• Question 1245: A household refrigerator is rated 200 watts. If electricity costs 5k per kWh, what is the cost of operating it in 20 days? Options:
  A) N4.80
  B) N48.00
  C) N480.00
  D) N4800.00
  Show Answer
  The correct answer is C .
• Question 1246:

  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 1247: Non-luminous object can be seen because they Options:
  A) reflect light
  B) are near
  C) are polished
  D) emit light
  Show Answer
  The correct answer is A .
• Question 1248:
  

  In the figure, the value of R is

  Options:
  A) 3$\mathrm{\Omega }$
  B) 6$\mathrm{\Omega }$
  C) 4$\mathrm{\Omega }$
  D) 5$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 1249: A magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on Options:
  A) the number of turns in the coil
  B) the strength of the magnet
  C) the speed at which the magnet is moved
  D) all of the above
  E) none of the above
  Show Answer
  The correct answer is D .
• Question 1250: The ground is always cold at night because the Options:
  A) atmosphere absorbs the sun's energy at night
  B) earth radiates heat to the atmosphere at night
  C) sun no longer shine at night
  D) atmosphere reflects the sun's energy at night
  Show Answer
  The correct answer is B .