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 1831: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 1832: If the decay constant of a radioactive substance is 0.231s¹, the half-life is? Options:
  A) 3.00 s
  B) 0.12 s
  C) 0.33 s
  D) 1.50 s
  Show Answer
  The correct answer is A .
• Question 1833: An electric kettle with negligible heat capacity is rated at 2000W. If 2.0kg of water is put in it, how long will it take the temperature of water to rise from 20^OC to 100^OC? [specific heat capacity of water = 4200Jkg^-1k^-1] Options:
  A) 420S
  B) 336S
  C) 168S
  D) 48S
  Show Answer
  The correct answer is B .
• Question 1834: The equation P^xV^yT^z = Constant is Charles’ law if Options:
  A) x = 0, y = 1 and z = -1
  B) x = 0, y = -1 and z = 1
  C) x = 1, y = 1 and z = 0
  D) x = 1, y = 1 and z = -1
  E) x = 1, y = 1 and z = 1
  Show Answer
  The correct answer is A .
• Question 1835:

  The diagram shows a uniform meter rule AB which balances horizontally at the 90cm mark when a mass of 0.2kg is suspended from B. Calculate the mass of the meter rule.

  Options:
  A) 0.05kg
  B) 0.20kg
  C) 0.80kg
  D) 1.00kg
  Show Answer
  The correct answer is A .
• Question 1836: A steel wire of length 0.50m is stretched between two fixed points and its fundamental frequency is 200Hz. The speed of the wave in the wire is Options:
  A) 100ms^-1
  B) 120ms^-1
  C) 200ms^-1
  D) 250ms^-1
  Show Answer
  The correct answer is C .
• Question 1837: A jet engine develops a thrust of 270Ns when the velocity of the exhaust gases relative to the engine is 300ms^-1. What is the mass of the material ejected per second? Options:
  A) 81.00kg
  B) 9.00kg
  C) 0.90kg
  D) 0.09kg
  Show Answer
  The correct answer is C .
• Question 1838: A circuit has an area of 0.4m² and consists of 50 loops of wire. If the loops are twisted and allowed to rotate at a constant angular velocity of 10 rad s^-1 in a uniform magnetic field of 0.4T, the amplitude of the induced voltage is Options:
  A) 8V
  B) 16V
  C) 20V
  D) 80V
  Show Answer
  The correct answer is D .
• Question 1839: 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 1840: An inclined plane which makes an angle of 30^o with the horizontal has a velocity ratio of Options:
  A) 2
  B) 1
  C) 0.866
  D) 0.50
  Show Answer
  The correct answer is A .