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 551: Which of the following statements is NOT correct? Options:
  A) Molecules of a liquid are stationary
  B) Brownian motion is an evidence of particle nature of matter
  C) Matter is made up of molecules
  D) The molecules of matter are in constant motion
  Show Answer
  The correct answer is A .
• Question 552: An object is placed in front of a converging lens of a focal length 20cm. The image is virtual and has a magnification of 2. What is the distance of the object from the lens? Options:
  A) 5cm
  B) 10cm
  C) 30cm
  D) 40cm
  Show Answer
  The correct answer is B .
• Question 553: An electric kettle, connected to a 240V mains, produces 6.0 x 10⁵J of heat energy to boil a quantity of water in 5 minutes. Find the resistance of the kettle. Options:
  A) 14.4$\mathrm{\Omega }$
  B) 28.8$\mathrm{\Omega }$
  C) 144$\mathrm{\Omega }$
  D) 288$\mathrm{\Omega }$
  E) 2880$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 554:

  A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if, starting from rest, the mass acquires a velocity of 4ms^-1 in 8s [g = 10ms^-2]

  Options:
  A) 5N
  B) 50N
  C) 95N
  D) 105N
  Show Answer
  The correct answer is C .
• Question 555: The energy E of a photon and it's wavelength are related by Eλ = X. the numerical value of X is?
  [h = 6.63 x 10^-34js, c = 3 x 10⁸ ms^-1] Options:
  A) 6.6 X 10^-28
  B) 1.99 X 10^-27
  C) 6.60 x 10^-26
  D) 1.99 x 10^-25
  Show Answer
  The correct answer is D .
• Question 556: A metal of mass 0.5kg is heated to 100°C and then transferred to a well-lagged calorimeter of heat capacity 80JK^-1 containing water of heat capacity 420JK^-1 at 15°C. If the final steady temperature of the mixture is 25°C, find the specific heat capacity of the metal. Options:
  A) 877Jkg^-1K^-1
  B) 286Jkg^-1K^-1
  C) 133Jkg^-1K^-1
  D) 92Jkg^-1K^-1
  Show Answer
  The correct answer is C .
• Question 557: The pressure of a given mass of a gas changes from 200Nm^-2 to 120Nm^-2 while the temperature drops from 127°C to -73°C. The ratio of the final volume to the initial volume is Options:
  A) 2 : 5
  B) 5 : 4
  C) 5 : 2
  D) 4 : 5
  Show Answer
  The correct answer is B .
• Question 558: I. for current amplification.II. for voltage stabilization. III. for power amplification.IV. as a switch.which of the above are the uses of transistor? Options:
  A) I,II,III and IV
  B) I,III, and IV only
  C) I, II and III only
  D) I,II and IV only
  Show Answer
  The correct answer is B .
• Question 559:

  

  The diagram above is a block and tackle pulley system in which an effort of 80N is use to lift a load of 240N. The efficiency of the machine is

  Options:
  A) 60%
  B) 50%
  C) 40%
  D) 33%
  Show Answer
  The correct answer is B .
• Question 560: Radio carrier waves are generated by causing electrons to oscillate rapidly in Options:
  A) a microphone
  B) a television camera
  C) an antenna
  D) coaxial cables
  E) a transmitter
  Show Answer
  The correct answer is E .