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 1581:

  T(oC)	0	5	10	15	20	40	60
  S.V.P (mmHg)	4.58	6.51	8.94	12.67	17.50	55.10	149.00

  The table above shows the saturation vapour pressure against temperature in a certain town. If the vapour pressure in this town at 20^oC is 10mmHg, what is the relative humidity?

  Options:
  A) 170.0%
  B) 57.0%
  C) 17.5%
  D) 10.0%
  Show Answer
  The correct answer is B .
• Question 1582: For a best result using temperature to achieve an accurate measurement, it is best to use Options:
  A) Mercury thermometer
  B) gas thermometer
  C) clinical thermometer
  D) alcohol thermometer
  Show Answer
  The correct answer is B .
• Question 1583: Which of the following statements about defects of vision is/are CORRECT? i. for a long sighted person, close objects appear blurred. ii. for a short sighted person, distant objects appear blurred. iii. short sight is corrected by using a pair of converging lenses. Options:
  A) i only
  B) ii only
  C) i and ii only
  D) ii and iii only
  E) i, ii and iii
  Show Answer
  The correct answer is C .
• Question 1584: When a ray of light passes from water to glass, it is Options:
  A) bent away from the normal
  B) bent towards the normal
  C) totally internally reflected
  D) absorbed by the glass
  E) broken into a pure spectrum
  Show Answer
  The correct answer is B .
• Question 1585:

  I. All the three forces must be concurrent.

  II. The upward force is equal to the downward force.

  III. The algebraic sum of the moment about any point must be zero.which of the above conditions must hold for a body acted upon by a system of three coplanar forces equilibrium?

  Options:
  A) I and II only
  B) I and III only
  C) II and III only
  D) I, II and III
  Show Answer
  The correct answer is B .
• Question 1586:

  Calculate the absolute pressure at the bottom of a lake at a depth of 32.8 m. Assume the density of the water is 1 x 10^3 kgm-3 and the air above is at a pressure of 101.3 kPa.

  [Take g = 9.8 ms-2]

  Options:
  A) 422.7
  B) 220.14
  C) 464.53
  D) 321.74
  Show Answer
  The correct answer is A .
• Question 1587:

  If the fraction of the atoms of a radioactive material left after 120years is $\frac{1}{64}$, what is the half-life of the material?  $\frac{1}{64}$

  Options:
  A) 20 years
  B) 10 years
  C) 2 years
  D) 24 years
  Show Answer
  The correct answer is A .
• Question 1588: The physical properties of sound waves can best be described by Options:
  A) reflection and diffraction
  B) polarization and reflection
  C) polarization and diffraction
  D) polarization and refraction
  Show Answer
  The correct answer is A .
• Question 1589:

  

  The net capacitance of the circuit shown above is

  Options:
  A) 8.0µF
  B) 6.0µF
  C) 4.0µF
  D) 2.0µF
  Show Answer
  The correct answer is D .
• Question 1590: 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 .