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 401: A waterfall is 6.30m high. What is the change in temperature of a quantity of water that falls from the top to the bottom of the waterfall? (Neglect heat losses to the surroundings, take g as 10 ms^-2 and specific heat capacity of weather as 4200,J kg^-1K^-1 Options:
  A) 0.15°C
  B) 1.50°C
  C) 15.00°C
  D) 21.00 °C
  E) 50.00°C
  Show Answer
  The correct answer is B .
• Question 402: Which of the following is NOT an example of a percussion instrument? Options:
  A) Bell
  B) Drum
  C) Flute
  D) Gong
  E) Xylophone
  Show Answer
  The correct answer is C .
• Question 403:

  Which of the following materials is a good insulator?

  Options:
  A) Silver
  B) Water
  C) Rubber
  D) Copper
  Show Answer
  The correct answer is C .
• Question 404:

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

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

  Options:
  A) I, II and III
  B) I, II, III and IV
  C) I, II and IV
  D) II, III and IV
  Show Answer
  The correct answer is A .
• Question 405: When a metal is heated to a high temperature, electrons are emitted from its surface. The process is known as Options:
  A) photoelectric effect
  B) thermionic emission
  C) field emission
  D) secondary emission
  E) radioactive emission
  Show Answer
  The correct answer is B .
• Question 406:

  A concave mirror of radius of curvature 40 cm forms a real image twice as large as the object.

  The object distance is

  Options:
  A) 10 cm
  B) 30 cm
  C) 40 cm
  D) 60 cm
  Show Answer
  The correct answer is B .
• Question 407: When the temperature difference between the wet and dry bulbs of a hygrometer is high, this indicates that Options:
  A) it is about to rain
  B) the relative humidity is high
  C) there is plenty of sunshine
  D) the relative humidity is low
  Show Answer
  The correct answer is D .
• Question 408: The water at the bottom of a waterfall is slightly warmer than that at the top because part of the Options:
  A) potential energy raises the water temperature
  B) water absorbs latent heat from the atmosphere
  C) kinetic energy is changed intyo internal energy
  D) dropping mass of water increases the heat capacity
  E) A and C above
  Show Answer
  The correct answer is C .
• Question 409:

  Which of the following statement about the electromagnet shown above is correct?

  Options:
  A) when the current flows from A to B, the end A will be in north pole
  B) when the current flows from A to B, the end A will be south pole
  C) when the current flows from A to B, the end B will be north pole
  D) none of the above
  Show Answer
  The correct answer is B .
• Question 410:

  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 .