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 921: The compressed regions and the space-out regions in longitude wave are refers to as Options:
  A) Compression and Rarefaction
  B) Comparison and Explosion
  C) Reflection only
  D) Refraction only
  Show Answer
  The correct answer is A .
• Question 922: A particle in circular motion performs 30 oscillation in 6 seconds. Its angular velocity is Options:
  A) 5 rad s^-1
  B) 6 rad s^-1
  C) 5π rad s^-1
  D) 10π rad s^-1
  Show Answer
  The correct answer is D .
• Question 923: Two rays of light from a point below the surface of water are equally inclined to each other at 60^o in water. What is the angle between the rays when they emerge into air? (Take the refractive index of water to be $\frac{4}{3}$) Options:
  A) 41.8^o
  B) 44.1^o
  C) 60.0^o
  D) 83.6^o
  E) 120.0^o
  Show Answer
  The correct answer is D .
• Question 924: A force F required to keep a 5 kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms^-1. What is the speed, if the force is tripled? Options:
  A) 4.0 ms^-1
  B) 6.6 ms^-1
  C) 12.1 ms^-1
  D) 21.0 ms^-1
  Show Answer
  The correct answer is C .
• Question 925: Why does a piece of cork float on water? Options:
  A) there is no upthrust on it when completely immersed in water
  B) the upthrust on it when completely immersed in water
  C) the upthrust on it when completely immersed in water is less than its weight in air
  D) its specific gravity is greater than that of water
  E) its specific gravity is the same as that of water
  Show Answer
  The correct answer is E .
• Question 926: A box is pulled a distance s along a smooth horizontal floor by a force of magnitude F, inclined at an angle θ to the horizontal. The work done is Options:
  A) Fs cos θ
  B) Fs cosec θ
  C) Fs sec θ
  D) Fs sin θ
  E) Fs tan θ
  Show Answer
  The correct answer is A .
• Question 927: A body has masses of 0.013kg and 0.012 kg in oil and water respectively. If the relative density of oil is 0.875 calculate the mass of the body. Options:
  A) 0.02 kg
  B) 0.03kg
  C) 0.04kg
  D) 0.05kg
  E) 0.06kg
  Show Answer
  The correct answer is A .
• Question 928: Which of the following statements is (are) NOT correct? i. pressure changes do not affect the speed of sound in air ii. the velocity of sound increases with temperature iii. the quality of the note depends only on its frequency Options:
  A) i only
  B) ii only
  C) iii only
  D) i and iii
  E) ii and iii
  Show Answer
  The correct answer is D .
• Question 929: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 930: Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is Options:
  A) conical
  B) cubical
  C) cylindrical
  D) parabolic
  E) spherical
  Show Answer
  The correct answer is C .