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 1541: A hot metal ball is suspended in the open air. As it cools it loses heat by Options:
  A) conduction only
  B) convection only
  C) radiation only
  D) conduction and convection
  E) convection and evaporation
  Show Answer
  The correct answer is B .
• Question 1542:

  A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undistributed. Eventually all the water tested salty. This action isdue to?

  Options:
  A) convection
  B) osmosis
  C) capillarity
  D) diffusion
  Show Answer
  The correct answer is D .
• Question 1543: A piece of stone attached to one end of a string is whirled round in a horizontal circle and the string suddenly cuts. The stone will fly off in a direction Options:
  A) perpendicular to the circular path
  B) parallel to the circular path
  C) tangential to the circular path
  D) towards the center of the circle
  Show Answer
  The correct answer is C .
• Question 1544: In measuring high frequency a.c, the instrument used is the Options:
  A) d.c ammeter
  B) moving coil ammeter
  C) moving iron ammeter
  D) hot wire ammeter
  Show Answer
  The correct answer is D .
• Question 1545: If a ball released from a height of 20m, How long would it take the ball to reach the ground? (assures g = 10m/s) Options:
  A) 2sec
  B) 3sec
  C) 35sec
  D) 2.4sec
  Show Answer
  The correct answer is A .
• Question 1546:

  A piano wire 50 cm long has a total mass of 10 g and its stretched with a tension of 800 N. Find the frequency of the wire when it sounds its third overtone note.

  Options:
  A) 800 Hz
  B) 600 Hz
  C) 400 Hz
  D) 200 Hz
  Show Answer
  The correct answer is A .
• Question 1547: Which of the following statements are true of an insulated charged body carrying positive charge? i. it contains excess positive charges. ii. it creates an electric field. iii. it possesses potential energy. iv. it carries electric current. Options:
  A) i and iv only
  B) i and ii only
  C) i, ii, iii only
  D) i, ii, iii and iv
  Show Answer
  The correct answer is D .
• Question 1548:

  I. Low pressure.
  II. High pressure.
  III. High p.d.
  IV. Low p.d.

  Which combination of the above is true of the conduction of electricity through gases?

  Options:
  A) I and IV only
  B) I and III only
  C) II and IV only
  D) II and III only
  Show Answer
  The correct answer is B .
• Question 1549: A current of 0.5 A flowing 3h Deposits 2g of metal during electrolysis. The quantity of the same metal that would be deposited by the currents of 1.5A flowing in 1h is Options:
  A) 2g
  B) 6g
  C) 10g
  D) 18g
  Show Answer
  The correct answer is A .
• Question 1550: Which of the following instruments helps to maintain the correct humidity and temperature of a building? Options:
  A) A compressor
  B) A refrigerator
  C) Air blower
  D) Air conditioner
  Show Answer
  The correct answer is D .