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 1981: A solid of weight 0.600N is totally immersed in oil and water respectively. If the upthrust of oil is 0.210N and the relative density of oil is 0.875. Find the upthrust in water. Options:
  A) 0.600N
  B) 0.360N
  C) 0.240N
  D) 0.180N
  Show Answer
  The correct answer is C .
• Question 1982: Four lenses are being considered for use as a microscope objective. Which of the following focal lengths is most suitable? Options:
  A) -5mm
  B) +5mm
  C) -5cm
  D) +5cm
  Show Answer
  The correct answer is B .
• Question 1983: A current of 0.5A flows through a resistor when connected to a 40-V battery. How much energy is dissipated in 2 minutes? Options:
  A) 1200J
  B) 1500J
  C) 2400J
  D) 96000J
  Show Answer
  The correct answer is C .
• Question 1984: Which of the following is true of sounds? Options:
  A) sound travels faster in air at 20^oC than at 30^oC
  B) the frequency of a given sound wave changes when it crosses the boundary seperating two media
  C) the wavelength of a given sound wave in air decreases as the temperature increases
  D) sound waves cannot be reflected
  Show Answer
  The correct answer is C .
• Question 1985:

  

  A uniform light beam XZ is Hinged at X and kept in equilibrium by the forces T and F as shown in the diagram above. if XO = 20m and OY = 30cm, express T in terms of F

  Options:
  A) T =2√3/3
  B) T= 2F
  C) T = 5V3F/3
  D) T = 5F
  Show Answer
  The correct answer is D .
• Question 1986: When a transformer has more secondary windings than primary windings, it Options:
  A) has a smaller secondary current
  B) has a greater power output
  C) is a step-down transformer
  D) increases the total energy output
  Show Answer
  The correct answer is C .
• Question 1987:

  I. The frictional force is independent of the area of the surfaces in conduct

  II. The frictional force depends on the nature of the surfaces in contact

  III. The frictional force depends on the speed of sliding

  IV. The frictional force is directly proportional to the normal reaction.Which combination of the above is true of sliding friction?

  Options:
  A) I, III and IV
  B) I, II and IV
  C) I, II and III
  D) II, III and IV
  Show Answer
  The correct answer is B .
• Question 1988: A piece of wire gauze can be made to lie on water because Options:
  A) the wire guaze is less dense than water
  B) the water molecules repels the wire guaze upwards
  C) the water surface has the effect of an elastic thin skin
  D) of the cohensive forces between the water and the wire guaze molecules
  Show Answer
  The correct answer is C .
• Question 1989:

  

  In the circuit diagram above, calculate the current in the 12 Ω resistor if the cell has an emf of 12V and an internal resistance of 1Ω

  Options:
  A) 0.8A
  B) 1.0A
  C) 1.6A
  D) 2.4A
  Show Answer
  The correct answer is D .
• Question 1990: In alternating current circuit at resonance, the angel of lead or lag is Options:
  A) π°
  B) (π)/2°
  C) (π)/3°
  D) 0°
  Show Answer
  The correct answer is B .