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 381: In a meter bridge experiment, two resistor 2$\mathrm{\Omega }$ and 3$\mathrm{\Omega }$ occupy the left and right gaps respectively. Find the balance point from the left side of the bridge Options:
  A) 20cm
  B) 40cm
  C) 60cm
  D) 80cm
  Show Answer
  The correct answer is B .
• Question 382:

  

  The diagram above represents the stress-strain graph of a loaded wire. Which of these statements is correct?

  Options:
  A) At J, the wire becomes plastic
  B) J is the yield point
  C) L is the elastic limit
  D) At K, the wire breaks
  Show Answer
  The correct answer is B .
• Question 383: Which of the following types of motion are oscillatory? i.a diving board when used by a diver. ii. the motion of the balance wheel of a wrist watch. iii. the motion of the turn-table of a record player. iv. the motion of the center of a ten kobo piece as it rolls down an inclined plane. v. the motion of the needle of a D.C. ammeter into which a low A.C. current is passed Options:
  A) i and ii
  B) i, ii and iii
  C) ii, ii and iv
  D) i, ii and v
  E) iii, iv and iv
  Show Answer
  The correct answer is A .
• Question 384:

  I. The frictional force is independent of the area of the surfaces in conduct

  II. The frictional force depends on the nature of the surfaces in contact

  III. The frictional force depends on the speed of sliding

  IV. The frictional force is directly proportional to the normal reaction.Which combination of the above is true of sliding friction?

  Options:
  A) I, III and IV
  B) I, II and IV
  C) I, II and III
  D) II, III and IV
  Show Answer
  The correct answer is B .
• Question 385:

  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 386: For a best result using temperature to achieve an accurate measurement, it is best to use Options:
  A) Mercury thermometer
  B) gas thermometer
  C) clinical thermometer
  D) alcohol thermometer
  Show Answer
  The correct answer is B .
• Question 387: When left in a freezer, a bottle full of water cracks on freezing into ice because of the Options:
  A) increase in the volume of water
  B) contraction of the bottle
  C) expansion of the bottle
  D) decrease in the volume of water
  Show Answer
  The correct answer is A .
• Question 388: In a resonance tube experiment, the effective length of the air column for the first resonance is 20cm when set into vibration by a tuning fork of frequency 480Hz. Neglecting and effect, the velocity of sound in air is Options:
  A) 96ms^-1
  B) 255ms^-1
  C) 340ms^-1
  D) 384ms^-1
  Show Answer
  The correct answer is D .
• Question 389:

  A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?

  Options:
  A) the magnet is moved towards the stationary solenoid
  B) there is no relative motion
  C) the magnet is moved away from the stationary solenoid
  D) the solenoid is moved away from the stationary magnet
  Show Answer
  The correct answer is B .
• Question 390: Which of the following properties of matter CANNOT be utilized for temperature measurement? The Options:
  A) length of a liquid column
  B) volume of a gas at constant pressure
  C) pressure of a gas at constant volume
  D) resistance of a metallic wire
  E) current produced in a photoelectric effect
  Show Answer
  The correct answer is E .