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 2181:

  

  The diagram above represents the stress-strain graph for a typical metal rod. What does the X represent?

  Options:
  A) Breaking point
  B) Yield point
  C) Elastic limit
  D) Proportional limit
  Show Answer
  The correct answer is A .
• Question 2182:

  

  The wire X in the figure above is at right angles to the plane of the paper and carries a current into the paper. at which of the points labelled 1-4, will the magnetic flux density due to this current be in the same direction as that of the horizontal component of earth's magnetic field

  Options:
  A) 1
  B) 2
  C) 3
  D) 4
  Show Answer
  The correct answer is C .
• Question 2183:

  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 2184: The optical instrument which is suitable for viewing a nearby objects is ………..? Options:
  A) Telescope
  B) sextant
  C) microscope
  D) periscope
  Show Answer
  The correct answer is C .
• Question 2185: If a water pump at Kainji Dam is capable of lifting 1000kg of water through a vertical height of 10m in 10s, the power of the pump is [g = 10ms^-2] Options:
  A) 1.0kW
  B) 10.0kW
  C) 12.5kW
  D) 15.0kW
  E) 20.0kW
  Show Answer
  The correct answer is B .
• Question 2186: A series RLC circuit is said to resonate, when Options:
  A) capacitive reactance is zero
  B) conductance is maximum
  C) current is minimum
  D) impedance is minimum
  E) inductive reactance is zero
  Show Answer
  The correct answer is D .
• Question 2187: A platinum-resistance thermometer has a resistance of 59 at 0^oC and 9Ω at l00^oC. Assuming that resistance changes uniformly with temperature, calculate the resistance of the thermometer when the temperature is 45^oC Options:
  A) 13.9 Ω
  B) 8.9 Ω
  C) 6.8 Ω
  D) 3.2 Ω
  E) 1.8 Ω
  Show Answer
  The correct answer is C .
• Question 2188: An object is placed 15cm in front of a concave mirror of radius 40cm. The image formed Options:
  A) virtual and 60cm behind the mirror
  B) real and 60cm behind the mirror
  C) virtual and at infinity
  D) real and at infinity
  E) virtual and 40cm from the mirror
  Show Answer
  The correct answer is A .
• Question 2189:

  The height at which the atmosphere cases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is

  (ρm = 13.6g/cm${}^3$ ρ = 0.00013g/cm${}^3$ )

  Options:
  A) 380mmHg
  B) 570mmHg
  C) 190mmHg
  D) 480mmHg
  Show Answer
  The correct answer is B .
• Question 2190: When the vapour of a substance is in equilibrium with its own liquid, it is said to be Options:
  A) gaseous
  B) unsaturated
  C) liquefied
  D) diffused
  E) saturated
  Show Answer
  The correct answer is E .