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 1391: The electric supply from Kainji Dam is transmitted at high voltages of the order hundreds of kilovolts but is converted to domestic use of about 220 volts by Options:
  A) commutators
  B) transistors
  C) valves and diodes
  D) rectifiers
  E) transformers
  Show Answer
  The correct answer is E .
• Question 1392: A ball of mass 100g falls from a height of 5m onto a concrete floor and rebounds to a height of 3m. Calculate the energy lost. (g = 10ms^-2) Options:
  A) 2J
  B) 20J
  C) 100J
  D) 1000J
  E) 2000J
  Show Answer
  The correct answer is A .
• Question 1393: A pilot records the atmospheric pressure outside its plane as 63cm of Hg while a ground observer records a reading of 75cm of Hg for the atmospheric pressure on the ground. Assuming that the density of the atmosphere is constant, calculate the height of the plane above the ground. (Relative density of Hg = 13.0 and that of air = 0.00013) Options:
  A) 1200m
  B) 6300m
  C) 7500m
  D) 13800m
  Show Answer
  The correct answer is A .
• Question 1394: A man weight 800N climbs up a stairs to height of 15m in 12.5s. What is the man''s average power output? Options:
  A) 667W
  B) 810W
  C) 960W
  D) 15000W
  Show Answer
  The correct answer is C .
• Question 1395: an electric cell with nominal voltage E has a resistance of 3Ω connected across it. If the voltage falls to 0.6E, the internal resistance of the cell is Options:
  A) 1Ω
  B) 2Ω
  C) 3Ω
  D) 4Ω
  Show Answer
  The correct answer is C .
• Question 1396: The colours seen in the thin films of oil on the road and in soap bubbles are due to Options:
  A) reflection
  B) interference
  C) diffraction
  D) polarization
  Show Answer
  The correct answer is A .
• Question 1397: A note is called an octave of another note when Options:
  A) its frequency is twice that of the first note
  B) its frequency is half of the first note
  C) the notes have the same fundamental frequency
  D) its periodic time is twice that of the first note
  Show Answer
  The correct answer is A .
• Question 1398: Which of the following quantities has the same unit as the watt? Options:
  A) Force x time
  B) Force x distance
  C) Force x acceleration
  D) Force x velocity
  Show Answer
  The correct answer is D .
• Question 1399: A gas at a pressure of 10⁵Nm^-2expands from 0.6m^-3 to 1.2m³ at constant temperature, the work done is Options:
  A) 7.0 x 10⁶J
  B) 6.0 x 10 ⁶J
  C) 6.0 x 10 ⁵J
  D) 6.0 x 10 ⁴J
  Show Answer
  The correct answer is D .
• Question 1400: When the bottom tip of a vibrating tuning fork is held in contact with a wooden box, a louder sound is heard. This phenomenon is known as Options:
  A) beats
  B) echoing
  C) resonance
  D) reverberation
  Show Answer
  The correct answer is C .