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 611: Which of the following does NOT cause a reduction of the surface tension of water? Options:
  A) soap solution
  B) detergent
  C) alcohol
  D) camphor
  E) grease
  Show Answer
  The correct answer is E .
• Question 612: The component of vector X along the direction of vector Y is zero when Options:
  A) X and Y are in opposite directions to each other
  B) X is at an angle of 45° to Y
  C) X is perpendicular to Y
  D) X and Y are parallel to each other
  Show Answer
  The correct answer is D .
• Question 613: The property of the eye known as its power of accommodation is controlled by the Options:
  A) pupil
  B) virteous humour
  C) iris
  D) ciliary muscles
  Show Answer
  The correct answer is D .
• Question 614:

  During the transformation of matter from the solid to the liquid state, the heat supplied does not produce temperature increase because

  Options:
  A) all the heat is used to break the bonds holding the molecules of the solid together
  B) the heat capacity has become very large as the substance melts
  C) the heat energy is quickly conducted away
  D) the heat gained is equal to the heat lost by the substance
  Show Answer
  The correct answer is A .
• Question 615: When a ship sails from salt water into fresh water, the fraction of its volume above the water surface will Options:
  A) increase
  B) decrease
  C) remain the same
  D) increase then decrease
  Show Answer
  The correct answer is B .
• Question 616: Which of the following statements correctly describe(s) cathode rays? i. they consist of tiny particles carrying negative electric charges. ii. they are deflected in a magnetic field but not in an electric field. iii. they consist of fast moving neutrons and deflected in an electric field. Options:
  A) i only
  B) ii only
  C) i and ii only
  D) ii and iii only
  Show Answer
  The correct answer is A .
• Question 617: Light of frequency 6.0 x 10¹⁴ Hz travelling in air is transmitted through glass or refractive index 1.5. Calculate the frequency of the light in the glass Options:
  A) 4.0 x 10¹⁴Hz
  B) 6.0 x 10¹⁴Hz
  C) 7.5 x 10¹⁴Hz
  D) 9.0 x 10¹⁴Hz
  Show Answer
  The correct answer is A .
• Question 618:

  A piece of substance of specific heatcapacity 450Jkg${}^{-1}$k${}^1$ falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms${}^{-2}$]

  Options:
  A) $\frac{2}{9}$ºC
  B) $\frac{4}{9}$ºC
  C) $\frac{9}{2}$ºC
  D) $\frac{9}{4}$ºC
  Show Answer
  The correct answer is B .
• Question 619:

  

  The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct

  Options:
  A) The solid will fall over if the vertical line through G lies outside the base
  B) The solid will fall over if the vertical line through lies inside the base
  C) The solid will not fall over if the vertical line through G lies outside the base
  D) The solid can never fall over
  Show Answer
  The correct answer is A .
• Question 620: Two objects, one having three times the mass of the other, are dropped at the same time from a tall building. When they are above the ground, the two objects will have the same Options:
  A) Momentum
  B) Kinetic energy
  C) Potential energy
  D) Acceleration
  Show Answer
  The correct answer is C .