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 1: A 120V, 60W lamp is to be operated on 220V ac supply mains. calculate the value of non inductive resistance that would be required to ensure that the lamp is run on correct value Options:
  A) 100Ω
  B) 200Ω
  C) 300Ω
  D) 500Ω
  Show Answer
  The correct answer is B .
• Question 2: A stone of mass m kg is held h meters above the floor for 50s. The work done in joules over this period is Options:
  A) mh
  B) mgh
  C) $\frac{mgh}{50}$
  D) O
  Show Answer
  The correct answer is D .
• Question 3:

  

  Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance between E and F is

  Options:
  A) 0.75µF
  B) 1.33µF
  C) 3.00µF
  D) 6.00µF
  Show Answer
  The correct answer is B .
• Question 4:

  An alternating current can induce voltage because it has

  Options:
  A) ripple value
  B) varying magnetic field
  C) weaker magnetic field than direct current
  D) high peak value
  Show Answer
  The correct answer is B .
• Question 5:

  

  From the diagram above, the inductive reactance and the resistance R are respectively

  Options:
  A) 50Ω and 45Ω
  B) 25Ω and 51Ω
  C) 20Ω and 50Ω
  D) 10Ω and 49Ω
  Show Answer
  The correct answer is D .
• Question 6: A platinum resistance thermometer wire has a resistance of 5 ohms at 0^oC and 5.5 ohms at 100^oC. Calculate the temperature of the wire when the resistance is 5.2 ohms Options:
  A) 80^oC
  B) 60^oC
  C) 40^oC
  D) 10^oC
  Show Answer
  The correct answer is C .
• Question 7: Normal atmospheric pressure at sea-level is 10⁵Nm^-2 and the acceleration due to gravity is approximately 10ms^-1. If the atmosphere has a uniform density of 1kgm^-3, its height is Options:
  A) 100m
  B) 1000m
  C) 10 000m
  D) 100 000m
  E) 1000 000m
  Show Answer
  The correct answer is C .
• Question 8: a force of 16N applied 4.0kg block that is at rest on a smooth, horizontal surface. What is the velocity of the block at t = 5 seconds? Options:
  A) 4ms^-1
  B) 10ms^-1
  C) 20ms^-1
  D) 50ms^-1
  E) 80ms^-1
  Show Answer
  The correct answer is C .
• Question 9:

  ${}_{13}^{27}Al$ + ${}_0^{1}n$ $\Rightarrow$ ${}_{11}^{24}Na$ + X

  Options:
  A) a proton
  B) a gamma ray
  C) a helium particle
  D) an alpha particle
  Show Answer
  The correct answer is D .
• Question 10:

  

  The figure above shows two similar bulbs X and Y connected to suitable power supply with F as an appropriate fuse rating, if the filament of X breaks then the

  Options:
  A) Brightness Of Y will reduce
  B) Brightness Of Y will remain constant
  C) Brightness Of Y will increase
  D) fuse F will blow
  Show Answer
  The correct answer is C .