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 211: If a cage containing a truck of coal weighing 750 kg is raised to a height of 90 m in a minute, what is the total power expended?
  [g = 10 ms²] Options:
  A) 11.50 kw
  B) 12.60 kw
  C) 11.25 kw
  D) 12.10 kw
  Show Answer
  The correct answer is C .
• Question 212: If a solid changes directly into a gas when heat is applied the process is called Options:
  A) vaporization
  B) evaporation
  C) sublimation
  D) ionization
  E) conversion
  Show Answer
  The correct answer is C .
• Question 213: The fundamental frequency of vibration of a sonometer wire may be halved by Options:
  A) doubling the length of the wire
  B) doubling the mass of the wire
  C) reducing the tension by half
  D) reducing the absolute temperature by half
  Show Answer
  The correct answer is A .
• Question 214: A dynamo primarily combines Options:
  A) mechanical energy into electrical energy
  B) electrical energy into kinetic energy
  C) potential energy into kinetic energy
  D) kinetic energy into potential energy
  Show Answer
  The correct answer is A .
• Question 215: A semiconductor diode is used in rectifying alternating current into direct current mainly because it Options:
  A) allows current to flow in either direction
  B) is non-linear
  C) offers a high input resistance
  D) allows current to flow only in one direction
  Show Answer
  The correct answer is D .
• Question 216:

  A ball of mass 0.5kg moving at 10ms${}^{-1}$ collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

  Options:
  A) 0.2ms${}^{-1}$
  B) 0.5ms${}^{-1}$
  C) 5.0ms${}^{-1}$
  D) 5.5ms${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 217: Which of the following with respect to a body performing simple harmonic motion are in phase? Options:
  A) displacement and velocity of the body
  B) displacement and force on the body
  C) velocity and acceleration of the body
  D) force acting on the body and the acceleration
  Show Answer
  The correct answer is C .
• Question 218: The phenomenon of photoelectric effect is NOT used in Options:
  A) automatic doors
  B) bimetallic strip thermometers
  C) light meters in cameras
  D) setting off burglar alarms
  E) sound production from film tracks.
  Show Answer
  The correct answer is B .
• Question 219: The spectrum of white light consists of coloured lights arranged in the following order Options:
  A) blue, red, green, yellow, indigo, violet, orange
  B) red, orange, yellow, green, blue, indigo, violet
  C) red, orange, yellow, indigo, green, blue, violet
  D) indigo, green, blue, violet, yellow, red, orange
  E) yellow, blue, green, violet, orange, indigo, red
  Show Answer
  The correct answer is B .
• Question 220:

  

  In the figure above, XY is of length 1m, The value of R at balance point Z is

  Options:
  A) 3.0Ω
  B) 13.3Ω
  C) 15.0Ω
  D) 30.0Ω
  Show Answer
  The correct answer is D .