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 2781: The magnitude of the resultant of two mutually perpendicular forces, F₁ and F₂ is 13N, if the magnitude of F₁ is 5N, what is the magnitude of F₂? Options:
  A) 2.6N
  B) 6.0N
  C) 12.0N
  D) 18.0N
  Show Answer
  The correct answer is C .
• Question 2782:

  

  In the diagram above a beam of white light travels from a rare to a dense medium. What colours of light do the rays a, b and c respectively represents?

  Options:
  A) red, green and blue
  B) Green, red and blue
  C) Yellow , blue and red
  D) Blue , yellow and red
  Show Answer
  The correct answer is A .
• Question 2783: which of the following statements are TRUE of isotopes? i. isotopes of an element have the same chemical properties because they have the same number of electrons. ii. isotopes of elements are normally separated using physical properties. iii. isotopes of an element have the same number of protons in their nuclei. 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 2784: Calculate the force acting on an electron of charge 1.6 x 10^-19C placed in an electric field of intensity 10⁸Vm^-1 Options:
  A) 1.6 x 10^-11N
  B) 1.6 x 10^-14N
  C) 1.6 x 10^-16N
  D) 1.0 x 10^-16N
  Show Answer
  The correct answer is A .
• Question 2785: A reservoir 500 m deep is filled with a fluid of density 850 kgm^-3. If the atmospheric pressure is 1.05 x 10⁵ Nm^-2, the pressure at the bottom of the reservoir is.
  [g = 10ms^-2] Options:
  A) 4.72 x 10⁶ Nm^-2
  B) 4.36 x 10⁶ Nm^-2
  C) 4.28 x 10⁶ Nm^-2
  D) 4.25 x 10⁶ Nm^-2
  Show Answer
  The correct answer is D .
• Question 2786:

  I. Diameter of a small ball bearing.

  II. Thickness of a pieces of paper.

  III. Diameter of a measuring cylinder.

  IV. Length of a piece of wire.

  Which of the above can be measured using a micrometer screw gauge?

  Options:
  A) I, II and IV only .
  B) I and II only
  C) II and III only
  D) III and IV only
  Show Answer
  The correct answer is B .
• Question 2787: A bar of initial length /₀ is heated through a temperature change $\mathrm{\Delta }$t to a new length I. The linear expansivity, a, of the bar is Options:
  A) $\frac{/-{/}_o}{/\mathrm{\Delta }t}$
  B) $\frac{/-{/}_o}{{/}_o\mathrm{\Delta }t}$
  C) /_o(1 + $\mathrm{\Delta }$ t)
  D) $\frac{/-{/}_o}{/(1+\mathrm{\Delta }t)}$
  Show Answer
  The correct answer is B .
• Question 2788: A silicon material is dopped with an element of a certain group and an n-type semi-conductor is formed. the most likely group of the element is Options:
  A) V
  B) III
  C) I
  D) II
  Show Answer
  The correct answer is A .
• Question 2789: If the refractive index of a medium in air is 2.0, what is the critical angle for this medium? Options:
  A) 30^o
  B) 42^o
  C) 45^o
  D) 50^o
  Show Answer
  The correct answer is A .
• Question 2790: If the refractive index of water is 1.33, what is the critical angle for a water-air boundary? Options:
  A) 36.0 °
  B) 40.2 °
  C) 41.8 °
  D) 48.8 °
  E) 62.7 °
  Show Answer
  The correct answer is D .