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 1451: 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 1452:

  When a water droplet is placed on a freshly cut piece of wood, it spreads out to form a thin layer because the wood is

  Options:
  A) not at equilibrium with the water
  B) cohesive to water
  C) at equilibrium with the water
  D) adhesive to water
  Show Answer
  The correct answer is D .
• Question 1453: The fundamental frequency of a plucked wire under a tension of 400N is 250Hz. When the frequency is changed to 500 Hz at constant length, the tension is Options:
  A) 1600N
  B) 400N
  C) 160N
  D) 40N
  Show Answer
  The correct answer is A .
• Question 1454: An object of mass 2kg moves for 5s with a uniform velocity of 10ms. What is the magnitude of its acceleration in ms^-2
  ? Options:
  A) zero
  B) 2.5
  C) 10
  D) 12.5
  E) 100
  Show Answer
  The correct answer is A .
• Question 1455: When a negatively charged rod is brought near the cap of a charged gold leaf electroscope which has positive charges, the leaf Options:
  A) Remains the same
  B) Collapses
  C) Collapses and diverges again
  D) Diverges
  Show Answer
  The correct answer is B .
• Question 1456: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 1457: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 1458: A mass of gas at 7^oC and 70cm of mercury has a volume of 1200cm³. Determine its volume at 27^oC and pressure of 75cm of mercury. Options:
  A) 1200cm³
  B) 1378cm³
  C) 4320cm³
  D) 4629cm³
  Show Answer
  The correct answer is A .
• Question 1459: The eclipse of the sun occurs when the Options:
  A) moon is between the sun and the earth
  B) earth is between the sun and the moon
  C) moon is not completely hidden in the earth's shadow
  D) moon's umbra falls on some part of the earth
  Show Answer
  The correct answer is A .
• Question 1460: A bar magnet is most effectively demagnetized by Options:
  A) placing it in a N - 5 position and hitting it with a hammer
  B) subjecting it to an electric current from a battery
  C) bringing its north pole in contact with the north pole of a very strong magnet
  D) heating the magnet
  Show Answer
  The correct answer is A .