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 2091: Which of the following statements give the TRUE difference between evaporation and boiling? i. Evaporation occurs at all temperatures while boiling occurs at a fixed temperature for a given pressure. ii. Evaporation is a surface phenomenon while boiling is an interior phenomenon. iii. Evaporation is affected by surface area while boiling is not. Options:
  A) i and ii only
  B) i and iii only
  C) ii and iii only
  D) i, ii, iii.
  Show Answer
  The correct answer is D .
• Question 2092: What is the approximate critical angle for total internal reflection for diamond if the refractive index of diamond is 2.42? Options:
  A) 21^o
  B) 22^o
  C) 23^o
  D) 24^o
  Show Answer
  The correct answer is D .
• Question 2093: The sound from a source travelled to the bottom of the sea and the echo was heard 4s later. If the speed of sound in sea water is 1500ms^-1 the depth of the sea is Options:
  A) 6000m
  B) 3000m
  C) 1500m
  D) 375m
  Show Answer
  The correct answer is B .
• Question 2094: When white light is dispersed by a spectrometer, the component having the shortest wavelength is Options:
  A) orange
  B) green
  C) violet
  D) red
  Show Answer
  The correct answer is C .
• Question 2095: 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 2096:

  Consider the wave equation y = 5mm sin [1cm${}^{-1}$x - 60s${}^{-1}$t]. The wave number is?

  Options:
  A) 0.1 cm${}^{-1}$
  B) 10cm${}^{-1}$
  C) 1.0cm${}^{-1}$
  D) 2cm${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 2097:

  Which of the units of the following physical quantities are derived?

  I. Area
  II. Thrust
  III. Pressure
  IV. Mass

  Options:
  A) I, II, III and IV
  B) I, II, and III only
  C) I, II, and IV only
  D) I and IV only
  Show Answer
  The correct answer is B .
• Question 2098:

  A convex mirror is used as a driving mirror because

  I. its image is erect

  II. It has a large field of view

  III. It has a long focal length

  Identify the CORRECT statement(s)

  Options:
  A) I and III only
  B) I and II only
  C) II and IIII only
  D) I, II and III only
  Show Answer
  The correct answer is B .
• Question 2099: In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that Options:
  A) a gold nucleus contains protons, neutrons and electrons uniformly distributed in a tiny volume
  B) the gold nucleus is positively charged and is concentrated in a tiny volume
  C) the gold nucleus emitted alpha particles
  D) the gold nucleus is concentrated in a tiny volume and contains alpha particles
  Show Answer
  The correct answer is B .
• Question 2100: If the maximum voltage across a 100ohms resistor is 20V, then the maximum power it can dissipate is Options:
  A) 5.00W
  B) 4.00W
  C) 2.00W
  D) 25W
  Show Answer
  The correct answer is B .