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 451: A galvanometer has a resistance of 5Ω. By using a shunt wire of resistance 0.05Ω, the galvanometer could be converted to an ammeter capable of reading 2Amp. What is the current through the galvanometer? Options:
  A) 2mA
  B) 10mA
  C) 20mA
  D) 25mA
  Show Answer
  The correct answer is C .
• Question 452: The angle between the geographic and the magnetic meridians at a place on the earth’s surface is the Options:
  A) angle of declination
  B) angle of depression
  C) angle of dip.
  D) latitude of the place
  E) longitude of the place
  Show Answer
  The correct answer is A .
• Question 453:

  

  In the diagram above, the values of V₁ and V₂ are respectively

  Options:
  A) 1V and ¹/₃V
  B) ¹/₃V and 1V
  C) ¹/₃V and ²/₃V
  D) 1V and ²/₃V
  Show Answer
  The correct answer is D .
• Question 454: The equation of transverse wave traveling along a string is given by Y = 0.3 sin(0.5x - 50t) where Y and X are in cm and t is in seconds.Find the maximum displacement of the particles from the equilibrium position Options:
  A) 50.0cm
  B) 2.5 cm
  C) 0.5cm
  D) 0.3cm
  Show Answer
  The correct answer is D .
• Question 455: A thin film of liquid is trapped between two glass plates. The force required to pull the plates apart will increase if the Options:
  A) surface tension of the liquid is reduced
  B) perpendicular distance between the plates is increased
  C) area of the liquid surface in contact with the plates is increased
  D) pressure of the air is decreased
  Show Answer
  The correct answer is C .
• Question 456: The instrument that measures both ac and dc is called Options:
  A) A current balance
  B) a moving coil ammenter
  C) a moving iron ammeter
  D) an inverter
  Show Answer
  The correct answer is C .
• Question 457: A block of a substance X will sink in a liquid V but float liquid Z. Which of the following statements is NOT correct about the densities of the three substances? Options:
  A) Density of liquid Z is greater than that of X
  B) Density of liquid V is less than that of liquid X
  C) Density of liquid Y is less than that of liquid Z
  D) Liquid Z has the greatest density of all the three substances.
  E) If liquids Y and Z do not mix, liquid Z will float on liquid Y.
  Show Answer
  The correct answer is E .
• Question 458:

  What effort will a machine of efficiency 90% apply to lift a load of 180N if its efforts arm is twice as long as its load arm?

  Options:
  A) 80N
  B) 90N
  C) 100N
  D) 120N
  Show Answer
  The correct answer is C .
• Question 459: What is the S.I unit of relative density? Options:
  A) kg m^-2
  B) kg m²
  C) kg cm³
  D) has no S.I unit
  Show Answer
  The correct answer is D .
• Question 460: Which of the following could be effectively used to reduce friction? Options:
  A) kerosene
  B) grease
  C) water
  D) petrol
  Show Answer
  The correct answer is B .