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 841:

  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 842: Light of frequency 6.0 x 10¹⁴ Hz travelling in air is transmitted through glass or refractive index 1.5. Calculate the frequency of the light in the glass Options:
  A) 4.0 x 10¹⁴Hz
  B) 6.0 x 10¹⁴Hz
  C) 7.5 x 10¹⁴Hz
  D) 9.0 x 10¹⁴Hz
  Show Answer
  The correct answer is A .
• Question 843: When a biro pen rubbed on a dry silk cloth is moved very close to a piece of paper on a dry table, the pen is found to pick up the paper. This is because Options:
  A) both the pen and the cloth are magnetized
  B) the pen is magnetized but the cloth is not
  C) the pen is charged while the cloth is magnetized
  D) both the pen and the cloth are charged
  Show Answer
  The correct answer is D .
• Question 844: An electric kettle, connected to a 240V mains, produces 6.0 x 10⁵J of heat energy to boil a quantity of water in 5 minutes. Find the resistance of the kettle. Options:
  A) 14.4$\mathrm{\Omega }$
  B) 28.8$\mathrm{\Omega }$
  C) 144$\mathrm{\Omega }$
  D) 288$\mathrm{\Omega }$
  E) 2880$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 845: If two charged plates are maintained at a potential difference of 3 kv, the work done in taking a charge of 600µc across the field is Options:
  A) 0.8j
  B) 1.8j
  C) 9.0j
  D) 18.0j
  Show Answer
  The correct answer is B .
• Question 846: What happens when a, certain quantity of pure ice is completely changed to water at 0^oC? Options:
  A) latent heat is absorbed, the mass remains constant, and the volume decreases
  B) latent heat is given out, the mass remains constant and the volume decreases
  C) latent heat is given out, the mass increases and the volume remains constant
  D) latent heat is absorbed, the mass decreases and the volume increases
  Show Answer
  The correct answer is B .
• Question 847: Electricity is supplied to a school along a cable of total resistance 0.5$\mathrm{\Omega }$ with the maximum current drawn from the mains as 100A. The maximum energy dissipated as heat for 1 hr is Options:
  A) 3.6 x 10³J
  B) 5.0 x 10³J
  C) 3.0 x 10⁵J
  D) 1.8 x 10⁷J
  Show Answer
  The correct answer is D .
• Question 848:

  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 849: A magnet is similar to a bipolar charged system in that Options:
  A) it consists of two opposite poles - the north and south poles
  B) the earth's magnetic field has a south pole near the geographical north pole and a north pole near the geographical south pole
  C) the force of attraction and repulsion between opposite and between like poles obeys a law for electrostatic charges
  D) A and B only
  E) A and C only
  Show Answer
  The correct answer is E .
• Question 850: 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 .