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 2231: Calculate the specific latent heat of vaporization of steam of 1.13 x 106J pf heat energy is required to convert 15kg of it to water. Options:
  A) 7.53 x 105 Jkg${}^{-1}$
  B) 7.53 x 10-2Jkg${}^{-1}$
  C) 7.53 x 104Jkg${}^{-1}$
  D) 7.53 x 10-3Jkg${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 2232:

  Which of the following instruments may be used to measure relative humidity?

  Options:
  A) Hydrometer
  B) Manometer
  C) Hygrometer
  D) Hypsometer
  Show Answer
  The correct answer is C .
• Question 2233:

  When water is boiling, it

  Options:
  A) gets hotter
  B) increase is mass
  C) decreases in mass
  D) changes to steam
  Show Answer
  The correct answer is D .
• Question 2234:

  When a yellow card is observed through blue glass, the card would appear

  Options:
  A) black
  B) green
  C) red
  D) white
  Show Answer
  The correct answer is A .
• Question 2235: A parallel plate capacitor of area 10cm² in vacuum has a capacitance of 10^-2$\mu$F. What is the distance between the plates?(e = 9 x 10^-12fm) Options:
  A) 9 x 10^-13m
  B) 9 x 10^-7m
  C) 9 x 10^-3m
  D) 9 x 10⁷m
  Show Answer
  The correct answer is B .
• Question 2236: A man walks 8km north and then 5km in a direction 60^o east of north. Find the distance from his starting point Options:
  A) 11.36km
  B) 12.36km
  C) 13.00km
  D) 14.36km
  Show Answer
  The correct answer is A .
• Question 2237: A pencil is placed vertically between a concave mirror and its focal point. The image of the pencil in the mirror will be Options:
  A) real, inverted and diminished
  B) virtual, inverted and enlarged
  C) real, erect and enlarged
  D) virtual, erect and enlarged
  Show Answer
  The correct answer is D .
• Question 2238: What is the frequency of the sound made by a siren having a disc with 32 holes and making 25 revolution per seconds? Options:
  A) 80Hz
  B) 600Hz
  C) 800Hz
  D) 1600Hz
  Show Answer
  The correct answer is C .
• Question 2239:

  If it takes 5.0 hrs to drain a container of 540.0cm³ of water, what is the flow rate of water from the container in kg^-1? [Density of water = 1000kgm^-3]

  Options:
  A) 32.5kg^-1 s
  B) 31.5kg^-1 s
  C) 30.8kg^-1 s
  D) 30.0kg^-1 s
  Show Answer
  The correct answer is D .
• Question 2240:

  The density of 400cm³ of palm oil was 0.9gcm^-3 before frying. If the density of the oil was 0.6gcm^-3 after frying, assuming no loss of oil due to spilling, its new volume was?

  Options:
  A) 1360cm${}^3$
  B) 600cm${}^3$
  C) 240cm${}^3$
  D) 8000m${}^3$
  Show Answer
  The correct answer is B .