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 871: 250g of lead at 170^oC is dropped into 100g of water at 0^oC. If the final temperature is 12^oC, the specific heat of lead is (specific heat of water is 4,200J/kg^oC) Options:
  A) 39.5J/kg^oC
  B) 50.4J/kg^oC
  C) 127.6J/kg^oC
  D) 154.6J/kg^oC
  E) 173.4J/kg^oC
  Show Answer
  The correct answer is C .
• Question 872: In Faradays law of electrolysis, a graph of the mass deposited against the quantity of electricity is plotted. The slope of the graph gives Options:
  A) the energy released
  B) the electrochemical equivalent
  C) the current flowing
  D) the charge released
  Show Answer
  The correct answer is B .
• Question 873: A test tube of radius 1.0cm is loaded to 8.8g. If is placed upright in water, find the depth to which it would sink Options:
  A) 2.8cm
  B) 5.2cm
  C) 25.5cm
  D) 28.0cm
  Show Answer
  The correct answer is A .
• Question 874: Which of the following elements are real magnetic materials? Options:
  A) Iron, steel and nickel
  B) copper, steel and iron
  C) lead, iron and brass
  D) glass, lead and steel
  E) stone, air and iron
  Show Answer
  The correct answer is A .
• Question 875: A 100kg box is pushed along a road with force of 500N. If the box moves with a uniform velocity, the coefficient of friction between the box and the road is Options:
  A) 0.4
  B) 1.0
  C) 0.8
  D) 0.5
  Show Answer
  The correct answer is D .
• Question 876: 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 877:

  The slope of the straight line displacement-time graph indicates?

  Options:
  A) distance traveled
  B) uniform velocity
  C) uniform acceleration
  D) uniform speed
  Show Answer
  The correct answer is B .
• Question 878: Induced emfs are best explained using Options:
  A) Ohm's law
  B) Faraday's law
  C) Colomb's law
  D) Lenz's law
  Show Answer
  The correct answer is D .
• Question 879:

  

  In the curve above, PQRST represents an alternating voltage of frequency 50Hz. The time interval between points P and R on the graph is

  Options:
  A) 25s
  B) 1/50s
  C) 1/100s
  D) 1/200s
  Show Answer
  The correct answer is C .
• Question 880:

  A projectile is fired from the ground level with a velocity of 300ms^-1 at an angle of a 30^o to the horizontal.

  Calculate the time taken to reach the maximum height?

  [g = 10ms^-2]

  Options:
  A) 30s
  B) 20s
  C) 25s
  D) 15s
  Show Answer
  The correct answer is D .