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 2171:

  I.Chemical
  II.Sound
  III.Electricity

  Which of the above forms of energy can directly be converted to light energy?

  Options:
  A) I and II only
  B) II and III only
  C) I, II and III
  D) I and III only
  Show Answer
  The correct answer is D .
• Question 2172: To convert an alternating current dynamo into a direct current dynamo, the Options:
  A) number of turns in the coil is increased
  B) strength of the field magnet is increased
  C) slip rings are replaced with a split ring commutator
  D) coil is wound on a soft iron armature
  Show Answer
  The correct answer is C .
• Question 2173:

  In a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively. What is the voltage across the capacitor?

  Options:
  A) 30V
  B) 70V
  C) 50V
  D) 40V
  Show Answer
  The correct answer is D .
• Question 2174: Two capacitors R₁ = 4$\mathrm{\Omega }$ and R₂ = 5$\mathrm{\Omega }$ are connected in parallel across a potential difference. If P₁ and P₂ represent power dissipated in R ₁ and R₂ respectively, then the ratio P₁ : P₂ is Options:
  A) 4 : 5
  B) 5 : 4
  C) 16 : 25
  D) 25 : 16
  Show Answer
  The correct answer is B .
• Question 2175: The velocity of a sound wave at 27^oC is 360ms^-1. Its velocity at 127^oC is Options:
  A) 120√3 ms^-1
  B) 240 ms^-1
  C) 240√3 ms^-1
  D) 720√3 ms^-1
  Show Answer
  The correct answer is C .
• Question 2176: A pool of water appears to be 1.0m deep when viewed vertically from above. If the refractive index of water is 1.33, what is the actual depth of the pool? Options:
  A) 0.750m
  B) 1.013m
  C) 1.330m
  D) 13.3000m
  Show Answer
  The correct answer is C .
• Question 2177:

  

  A force varying linearly with the distance acts on a body as shown above, The work done on the body by the force during the first 10m of motion is

  Options:
  A) 100J
  B) 150J
  C) 200J
  D) 300J
  E) 600J
  Show Answer
  The correct answer is A .
• Question 2178:

  

  The equivalent capacitance for the circuit drawn above is

  Options:
  A) 18µf
  B) 4µf
  C) 2µf
  D) 12µf
  E) 13µf
  Show Answer
  The correct answer is B .
• Question 2179: The note produced by a stretched string has a fundamental frequency of 400Hz. If the length of the string is doubled while the tension in the string is increased by a factor of 4, the frequency is Options:
  A) 200Hz
  B) 400Hz
  C) 800Hz
  D) 1600Hz
  Show Answer
  The correct answer is B .
• Question 2180: Which of the following gas laws is equivalent to the work done? Options:
  A) Boyle' law
  B) Charles law
  C) Pressure law
  D) van der Waal's law
  Show Answer
  The correct answer is A .