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 1351: A progressive wave is represented by $y=10\text{Sin}(1000\pi t-\frac{\pi x}{34})$ . two layers of the wave separated by 153cm have a phase difference of Options:
  A) 270⁰
  B) 45⁰
  C) 90⁰
  D) 180⁰
  E) No Correct Option
  Show Answer
  The correct answer is E .
• Question 1352: A transistor function mainly as a Options:
  A) switch and amplifier
  B) rectifier and an amplifier
  C) charge storer and an amplifier
  D) charge storer and a switch
  Show Answer
  The correct answer is A .
• Question 1353: An electric water pump rate 1.5 kW, lifts 200kg of water through a vertical height of 6 meters in seconds. What is the efficiency of the pump? [g = 10ms^-2, neglecting air resistance] Options:
  A) 90.0%
  B) 85.0%
  C) 80.0%
  D) 65.0%
  Show Answer
  The correct answer is C .
• Question 1354: If a source of sound is moving, a stationary listener will hear a sound of different frequency. This is called Options:
  A) Doppler effect
  B) Resonance
  C) Ultra sound
  D) Diffraction of sound
  E) Rarefaction
  Show Answer
  The correct answer is A .
• Question 1355: 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 1356:

  A body is uniformly accelerated from rest. Which of the following quantities vary/varies linearly with the square of the time? I. Displacement

  II. Velocity

  III. Momentum

  Options:
  A) I only
  B) II only
  C) III only
  D) I and II only
  E) II and Ill only
  Show Answer
  The correct answer is A .
• Question 1357: Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element? Options:
  A) Alpha rays
  B) Gamma rays
  C) Positive rays
  D) Ultraviolet rays
  E) X-rays
  Show Answer
  The correct answer is E .
• Question 1358: Total internal reflection occurs when light moves from Options:
  A) a dense medium to a less dense medium
  B) air to water
  C) water to glass
  D) a less dense to a dense medium
  Show Answer
  The correct answer is A .
• Question 1359: A waterfall is 1.260m high. Calculate the change in temperature of a quantity of water that falls from the top to the bottom of the waterfall. (Neglect heat losses to the surroundings, take g as 10m^-2 and specific heat capacity of water as 4200Jkg^-1K^-1) Options:
  A) 0.3^oC
  B) 3.0^oC
  C) 33.3^oC
  D) 42.0^oC
  E) 100.0^oC
  Show Answer
  The correct answer is B .
• Question 1360: A body of mass 12kg traveling at 4.2ms^-1 collides with a second body of mass 18kg at rest. Calculate their common velocity if the two bodies coalesce after collision Options:
  A) 1.5 ms^-1
  B) 1.4 ms^-1
  C) 2.1 ms^-1
  D) 1.7 ms^-1
  Show Answer
  The correct answer is D .