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 41:

  A 1000kg elevator is descending vertically with an acceleration of 1.0ms^-2, if the acceleration due to gravity is 10ms^-2, the tension in the suspending cable is

  Options:
  A) 1.0N
  B) 10.0N
  C) 9000.0N
  D) 11000N
  Show Answer
  The correct answer is C .
• Question 42: A radioisotope has a decay constant of 10^-7s^-1. The average life of the radioisotope is Options:
  A) 1.00 x 10⁷s
  B) 6.93 x 10⁸s
  C) 1.00 x 10^-7s
  D) 6.93 x 10⁷s
  Show Answer
  The correct answer is B .
• Question 43:

  

  The acceleration of the system show above is

  Options:
  A) 2ms^-2
  B) 4ms^-2
  C) 6ms^-2
  D) 8ms^-2
  Show Answer
  The correct answer is B .
• Question 44: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 45:

  A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms${}^{-1}$ from the top of a tower 10m high. Neglecting air resistance, its total energyjust before hitting the ground is? (Take g = 10ms${}^{-2}$)

  Options:
  A) 5J
  B) 10J
  C) 15J
  D) 20J
  Show Answer
  The correct answer is C .
• Question 46: Which of the following statements is correct about light and sound waves? Both Options:
  A) are longitudinal waves
  B) are transverse waves
  C) have the same velocity in air
  D) need a medium for propagation
  E) transmit energy
  Show Answer
  The correct answer is E .
• Question 47: The instrument used to view stars is the Options:
  A) Prism binoculars
  B) Telescope
  C) Film projector
  D) Microscope
  Show Answer
  The correct answer is B .
• Question 48: In a compound microscope Options:
  A) there is only one lens
  B) the objective lens have a shorter focal length than the eyepiece which is convex
  C) the objective lens has a longer focal length than the eyepiece which is convex
  D) the objective lens has a shorter focal length than the eyepiece which is concave
  E) the objective and the eyepiece are both convex and have the same focal length
  Show Answer
  The correct answer is B .
• Question 49: The pair of physical quantities consisting of vectors only are Options:
  A) momentum and power
  B) velocity and distance
  C) displacement and torgue
  D) accelaration and speed
  Show Answer
  The correct answer is C .
• Question 50: A 12V battery has an internal resistance of 0.5W.If a cable of 1.0W resistance is connected across the two terminals of the battery, the current drawn from the battery is Options:
  A) 16.0A
  B) 8.0A
  C) 0.8A
  D) 0.4A
  Show Answer
  The correct answer is B .