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 511:

  I. A liquid boils when its saturated vapor pressure is equal to the external pressure
  II. Dissolved substances in pure water lead to an increase in the boiling point.
  III. When the external pressure is increased, the boiling point increases.
  IV. Dissolved substances in pure water decreases the boiling point

  Which of the above combinations are peculiarities of the boiling point of a liquid?

  Options:
  A) I, II and III only
  B) I, II, III, and IV
  C) I, II, and IV
  D) II, III, and IV
  Show Answer
  The correct answer is A .
• Question 512: Power supply is transmitted at a very high voltage and low current in order to Options:
  A) make pass through the trasformers
  B) increase the power supply
  C) make it travel fast
  D) prevent overheating of the coil
  Show Answer
  The correct answer is D .
• Question 513:

  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 514:

  A man walks 1km due east and then 1 km due north. His displacement is

  Options:
  A) √2km N 45°E
  B) 1km N 30°E
  C) 1km N 15°E
  D) √2km N 60°E
  Show Answer
  The correct answer is A .
• Question 515:

  

  Which of the following figures gives the correct resultant R of two vectors P and Q?

  Options:
  A) I
  B) II
  C) III
  D) IV
  E) V
  Show Answer
  The correct answer is D .
• Question 516:
  

  Consider the three forces acting at O and in equilibrium as shown in the figure. Which of the following equations is/are CORRECT?

  I.P${}_1$ cos${\theta }_1$ = p${}_1$ cos ${\theta }_2$

  II. P${}_3$ = P${}_1$ cos ${\theta }_4$ + P${}_{2}co{s}_2$

  III. P${}_1\sin {\theta }_1=P_2\sin {\theta }_2$

  Options:
  A) I only
  B) II only
  C) III only
  D) I, II and III only
  Show Answer
  The correct answer is C .
• Question 517:

  

  From the diagram above, the bob of the pendulum has the fastest speed at

  Options:
  A) X
  B) Y
  C) Z
  D) W
  Show Answer
  The correct answer is A .
• Question 518:

  

  The figure above shows the heights of two liquids X and Y when some air is sucked out of the apparatus through the pump P. The diameter of the table in X is twice That of the Tube In Y. What is the relative density of the liquid X with respect to liquid Y

  Options:
  A) 1/3
  B) 2/3
  C) 3
  D) 6
  Show Answer
  The correct answer is C .
• Question 519: In a gas experiment, if the volume of the gas is plotted against the reciprocal of the pressure, the unit of the slope of the resulting curve is Options:
  A) force
  B) temperature
  C) power
  D) work
  Show Answer
  The correct answer is D .
• Question 520: The maximum permissible current through a galvanometer G of internal resistance 10$\mathrm{\Omega }$ is 0.05A. A resistance R is used to convert G into a voltmeter with a maximum reading of 100V. Find the value of R and how it is connected to G Options:
  A) 20,000 ohms in parallel
  B) 19,990 ohms in series
  C) 1990 ohms in series
  D) 100 ohms in series
  Show Answer
  The correct answer is C .