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 91: The point beyond which a stretched spring does not return to its original length is called the Options:
  A) breaking point
  B) elastic limit
  C) spring constant
  D) elasticity point
  E) release point
  Show Answer
  The correct answer is B .
• Question 92: A narrow, uniform glass tube, closed at one end, constains air which is sealed by a thread of mercury. The tube is placed first horizontally and then vertically with the open end at the top. Which of the following statements is correct? Options:
  A) The length of the entrapped air in the horizontal position is less than that in the vertical position
  B) The length of the entrapped air in the vertical position is less than that in the horizontal position
  C) The length of the mercury column becomes shorter in the horizontal position than in the vertical position
  D) The length of the mercury column becomes shorter in the vertical position than in the horizontal position
  E) The pressure of the entrapped air is atmospheric in both cases.
  Show Answer
  The correct answer is B .
• Question 93: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 94: Which of the following is NOT part of an a.c generator? Options:
  A) Commutator
  B) Armature
  C) Field magnet
  D) Carbon brushes
  E) Slip rings
  Show Answer
  The correct answer is B .
• Question 95: When a pure semiconductor is heated, its resistance Options:
  A) increases
  B) decreases
  C) remains the same
  D) increases and then decreases
  Show Answer
  The correct answer is B .
• Question 96: Which of the following is a percussion instrument? Options:
  A) Flute
  B) Organ
  C) Bell
  D) Piano
  E) Sonometer
  Show Answer
  The correct answer is C .
• Question 97: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 98: A heating coil rated at 100W is used to boil off 0.5kg of boiling water. The time taken to boil off the water is [specific latent heat of vaporization of water = 2.3 x 10⁶Jkg^-1] Options:
  A) 1.15 x 10⁹ s
  B) 1.15 x 10⁷ s
  C) 1.15 x 10⁵ s
  D) 1.15 x 10⁴ s
  Show Answer
  The correct answer is D .
• Question 99:

  Which of the following statements is not true?

  Options:
  A) The mechanical advantage of a smooth inclined plane depends on the ratio of the length to the height of the plane.
  B) The efficiency of an inclined plane decreases as the slope increases.
  C) The effort required to push a given load up an inclined plane increases as the slope increases.
  D) As the slope of an inclined plane increases, the velocity ratio decreases.
  Show Answer
  The correct answer is A .
• Question 100: A pressure cooker saves both time and fuel in cooking because inside the cooker, the Options:
  A) boiling point of water is raised
  B) pressure is constant
  C) heat is completely trapped
  D) temperature is evenly distributed
  E) volume of steam varies
  Show Answer
  The correct answer is A .