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 481:

  

  The diagram above represents balls in an undulating surface. Which of the following option represents positions of stable equilibrium?

  Options:
  A) III, IV and VIII
  B) II, V and VIII
  C) III, VI and IX
  D) I, IV and VII
  Show Answer
  The correct answer is C .
• Question 482:

  A boat at anchor is rocked by waves whose crest are 100m apart and whose velocity is 25ms^-1. At what interval does the wave crest reach the boat?

  Options:
  A) 2500.00s
  B) 75.00s
  C) 4.00s
  D) 0.25s
  Show Answer
  The correct answer is C .
• Question 483: The electrochemical equivalent of silver is 0.0012gC^-1. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0mins, the current must be Options:
  A) 6000A
  B) 100A
  C) 10A
  D) 1A
  Show Answer
  The correct answer is B .
• Question 484: Calculate the energy of the third level of an atom if the ground state energy is - 24.8eV Options:
  A) -9.20eV
  B) -8.20eV
  C) -2.75eV
  D) -1.75eV
  Show Answer
  The correct answer is C .
• Question 485: If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is Options:
  A) doubled
  B) reduced to a quarter
  C) reduced by half
  D) constant
  Show Answer
  The correct answer is B .
• Question 486: Total internal reflection will not occur when light travels from Options:
  A) water to air
  B) water into glass
  C) glass to air
  D) glass into water
  Show Answer
  The correct answer is B .
• Question 487: Am elastic material has a length of 36cm when a load of 40N is hung on it and a length of 45cm when a load of 60N is hung on it. The original length of the string is Options:
  A) 12cm
  B) 20cm
  C) 18cm
  D) 15cm
  Show Answer
  The correct answer is C .
• Question 488:

  Particles of mass 10${}^{-2}$kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad${}^{-1}$. If the radius of the blade is 0.2m, the centripetalforce is?

  Options:
  A) 2N
  B) 20N
  C) 200N
  D) 400N
  Show Answer
  The correct answer is B .
• Question 489: In the calibration of an ammeter using faraday's laws of electrolysis, the ammeter reading is kept constant at 1.2A. If 0.990g of copper is deposited in 40 minutes , the correction to be applied to the ammeter is Options:
  A) 0.03A
  B) 0.04A
  C) 0.05A
  D) 0.06A
  Show Answer
  The correct answer is C .
• Question 490: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .