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 231:

  The motion of a body is simple harmonic if the?

  Options:
  A) acceleration is always directed towards a fixed point
  B) path of motion is a straight line
  C) acceleration is proportional to the square of the distance from a fixed point
  D) acceleration is constant and directed towards a fixed point
  Show Answer
  The correct answer is A .
• Question 232: When an a.c. voltage is applied to a capacitor, no power is consumed because the current Options:
  A) leads the voltage by 90°
  B) lags behind the voltage by 90°
  C) and voltage are in phase
  D) and voltage are 180° out of phase
  Show Answer
  The correct answer is A .
• Question 233:

  Which of the following may be used to determine the relative humidity in a physics laboratory I. Manometer

  II. Wet-and-Dry Bulb Hygrometer

  III. Hair Hygrometer

  IV. A Hydrometer

  Options:
  A) I Only
  B) II and III Only
  C) II Only
  D) III Only
  E) II,IIIand IV Only
  Show Answer
  The correct answer is B .
• Question 234: A near sighted student has a near point of 0.1m and a focal length of 5.0cm. What is the student's far point? Options:
  A) 0.200m
  B) 8.000m
  C) 0.125m
  D) 2.100m
  E) No Correct Option
  Show Answer
  The correct answer is E .
• Question 235: A semiconductor diode is used in rectifying alternating current into direct current mainly because it Options:
  A) allows current to flow in either direction
  B) is non-linear
  C) offers a high input resistance
  D) allows current to flow only in one direction
  Show Answer
  The correct answer is D .
• Question 236:

  I. A liquid boils when its saturated vapor pressure is equal to the external pressure
  II. Dissolved substances in pure water lead to an increase in the boiling point.
  III. When the external pressure is increased, the boiling point increases.
  IV. Dissolved substances in pure water decreases the boiling point

  Which of the above combinations are peculiarities of the boiling point of a liquid?

  Options:
  A) I, II and III only
  B) I, II, III, and IV
  C) I, II, and IV
  D) II, III, and IV
  Show Answer
  The correct answer is A .
• Question 237: The half-life of a radioactive substance is 2 seconds. Calculate the decay constant Options:
  A) 0.035s^-1
  B) 0.151s^-1
  C) 0.347s^-1
  D) 0.576s^-1
  E) 1.386s^-1
  Show Answer
  The correct answer is C .
• Question 238: Which of the following pairs of musical instruments produce sound due to the vibration of air column? Options:
  A) Bell and piano
  B) Guitar and flute
  C) Trumpet and drum
  D) Trumpet and flute
  E) Violin and organ
  Show Answer
  The correct answer is D .
• Question 239:

  A body executing a simple harmonic motion has an angular velocity of 22 radians per second. If it has a maximum

  Options:
  A) 1100ms^-1
  B) 440 ms^-1
  C) 220 ms^-1
  D) 22 ms^-1
  E) 2.2ms^-1
  Show Answer
  The correct answer is E .
• Question 240: A gas would serve as an electrical conductor under Options:
  A) reduced pressure and high current
  B) increased magnetic field
  C) reduced pressure and reduced potential
  D) exposure to visible light
  Show Answer
  The correct answer is A .