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 521: If the wavelength of a wave travelling with a velocity of 360ms^-1 is 60cm, the period of the wave is Options:
  A) 6s
  B) 3.6s
  C) 0.17s
  D) 0.61s
  E) 3s
  Show Answer
  The correct answer is C .
• Question 522: Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is Options:
  A) 10W
  B) 20W
  C) 40W
  D) 80W
  E) None of the above
  Show Answer
  The correct answer is D .
• Question 523: The effect of a particle in a fluid attaining its terminal velocity is that the Options:
  A) acceleration is maximum
  B) weight is equal to the retarding force
  C) buoyancy force is equal to the to the viscous retardind force
  D) buoyancy force is more than the weight of the fluid displaced
  Show Answer
  The correct answer is B .
• Question 524: A charged particle is moving in a uniform magnetic field. if the direction of motion of the charged particle is parallel to the magnetic field, the path of the charge will Options:
  A) Be a straight line
  B) Curve inwards
  C) Be a parabola
  D) Curve outwards
  Show Answer
  The correct answer is A .
• Question 525: The resistance of a 240V, 60 watt electric filament bulb is Options:
  A) 0.25$\mathrm{\Omega }$
  B) 480$\mathrm{\Omega }$
  C) 60$\mathrm{\Omega }$
  D) 240$\mathrm{\Omega }$
  E) 960$\mathrm{\Omega }$
  Show Answer
  The correct answer is E .
• Question 526:

  

  The fig above shows two connected bodies of masses M1 and M2 in equilibrium under gravity. The tension in the upper string is

  Options:
  A) (m1-m2)g
  B) m1g
  C) m2g
  D) (m1+m2)g
  Show Answer
  The correct answer is D .
• Question 527: The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine? Options:
  A) 20N
  B) 30N
  C) 40N
  D) 50N
  Show Answer
  The correct answer is C .
• Question 528:

  400g of cold water is added to 200g of water at 70°C. If they are properly mixed and the temperature of the mixture is 300°C. calculate the initial temperature of the cold water. (Neglect the heat absorbed by the container)

  Options:
  A) 10°C
  B) 15°C
  C) 20°C
  D) 30°C
  E) 40°C
  Show Answer
  The correct answer is A .
• Question 529: Induced emfs are best explained using Options:
  A) Ohm's law
  B) Faraday's law
  C) Colomb's law
  D) Lenz's law
  Show Answer
  The correct answer is D .
• Question 530: The purpose of a dielectric material in a parallel plate capacitor is to Options:
  A) increase its capacitance
  B) decrease its capacitance
  C) insulate the plate from each other
  D) increase the magnetic field between the plates
  Show Answer
  The correct answer is C .