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 631:

  In a series R-L-C circuit at resonance, the voltages across the resistor and the inductors are 30V and 40V respectively. What is the voltage across the capacitor?

  Options:
  A) 30V
  B) 40V
  C) 50V
  D) 70V
  Show Answer
  The correct answer is B .
• Question 632: An object of mass 50kg is released from a height of 2m.Find the kinetic energy just before it strikes the ground Options:
  A) 250J
  B) 1000J
  C) 10 000J
  D) 100 000J
  Show Answer
  The correct answer is B .
• Question 633: What is the number of neutrons in the Uranium isotope ${}_{92}^{238}X$? Options:
  A) 92
  B) 146
  C) 238
  D) 330
  E) 119
  Show Answer
  The correct answer is B .
• Question 634:

  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 635: A quantity of water at 0°C is heated to about 30°C. At each degree rise in temperature, its density will Options:
  A) rise steadily
  B) fall steadily
  C) fall then rise
  D) rise then fall
  Show Answer
  The correct answer is D .
• Question 636:

  When the breaks in a car are applied, the frictional force on the tyresis?

  Options:
  A) a disadvantage because it is in the direction of the motion of the car
  B) a disadvantage because it is in the opposite direction of the motion of the car
  C) an advantage because it is in the direction of the motion of the car
  D) an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 637:

  A 2H inductor has negligible resistance and is connected to a $\frac{50}{\pi }$ Hz A.C supply. The reactance of the inductor is?

  Options:
  A) 200$\mathrm{\Omega }$
  B) 50$\mathrm{\Omega }$
  C) $\frac{100}{\pi }$
  D) $\frac{25}{\pi \mathrm{\Omega }}$
  Show Answer
  The correct answer is A .
• Question 638:

  Which of the following characteristics of a wave is used in the measurement of the depth of the Sea?

  Options:
  A) diffraction
  B) interference
  C) refraction
  D) reflection
  Show Answer
  The correct answer is D .
• Question 639: The speed of light in a Hg in the morning at a temperature of 27^oC. Hard driving in the afternoon raised the temperature of the tyres by 57^oC. The tyre pressure had by the afternoon was Options:
  A) increased by 15.0cm Hg
  B) decreased by 15.0cm Hg
  C) increased by 22.50cm
  D) decreased by 22.50cm Hg
  E) remained constant
  Show Answer
  The correct answer is A .
• Question 640: In Faradays law of electrolysis, a graph of the mass deposited against the quantity of electricity is plotted. The slope of the graph gives Options:
  A) the energy released
  B) the electrochemical equivalent
  C) the current flowing
  D) the charge released
  Show Answer
  The correct answer is B .