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 1151: Cathode rays are Options:
  A) high-energy electromagnetic waves
  B) protons
  C) streams of electrons
  D) neutrons
  E) radio waves
  Show Answer
  The correct answer is C .
• Question 1152:

  A step-down transformer is used on a 2.2 kV line to deliver 110 V. How many turns are on the primary windings if the secondary has 25 turns?

  Options:
  A) 20
  B) 250
  C) 200
  D) 500
  Show Answer
  The correct answer is D .
• Question 1153: A transformer which can produce 8V from a 240v a.c. supply, has an efficiency of 80%. If the current in the secondary coil is 15A, calculate the current in the primary coil. Options:
  A) 0.625A
  B) 1.600A
  C) 2.500A
  D) 6.250A
  Show Answer
  The correct answer is A .
• Question 1154: A body which weighs 50N in air displaces 3.7kg of water when partially immersed in water. Calculate the upthrust on the body? Options:
  A) 8.7N
  B) 37.0N
  C) 87.0N
  D) 13.0N
  Show Answer
  The correct answer is B .
• Question 1155:

  An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?

  Options:
  A) 3 days
  B) 2 days
  C) 1 day
  D) 4 days
  Show Answer
  The correct answer is B .
• Question 1156: An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image is Options:
  A) 80cm
  B) 40cm
  C) 50cm
  D) 70cm
  Show Answer
  The correct answer is B .
• Question 1157: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 1158: 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 1159: When a yellow card is viewed in blue light, It will appear Options:
  A) black
  B) orange
  C) purple
  D) red
  E) white
  Show Answer
  The correct answer is D .
• Question 1160: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .