NECO Physics Exam Past Questions and Answers

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 491: In 24 days a radioactive isotope decreases in mass from 128g to 2g. What is the half-life of the radioactive material? Options:
  A) 2.54 days
  B) 4.00 days
  C) 4.80 days
  D) 6.00 days
  E) 8.00 days
  Show Answer
  The correct answer is B.
• Question 492:

  Totally reflecting prisms are preferred to mirrors in periscopes becauseI. mirror givegive multiple images

  II. silvering on mirrors is easy damaged

  III. mirrors reflect less light than totally reflecting prisms

  Options:
  A) I only
  B) I and II only
  C) I and III only
  D) II and III only
  E) I,II and III
  Show Answer
  The correct answer is D.
• Question 493: In 24 days a radioactive isotope decreases in mass from 64g to 2g. What is the half life of the radioactive material Options:
  A) 0.75 days
  B) 2.58 days
  C) 4 days
  D) 4.80 days
  E) 6 days
  Show Answer
  The correct answer is D.
• Question 494: Which of the following scientists postulated that moving particles exhibit wave properties? Options:
  A) Niels Bohr
  B) Ernest Rutherford
  C) Werner Heisenberg
  D) Louis de Broglie
  E) Erwin Schroedinger
  Show Answer
  The correct answer is D.
• Question 495: An electric motor primary converts Options:
  A) electrical energy to chemical energy
  B) electrical energy to heat energy
  C) electrical energy to mechanical energy
  D) mechanical energy to electrical energy
  E) mechanical energy to light energy
  Show Answer
  The correct answer is C.
• Question 496:

  A body moves along a circular path with uniform angular speed of 0.6 rad s^-1 and at a constant speed of 3.0 ms^-1. Calculate the acceleration of the body towards the centre of the circle.

  Options:
  A) 0.2.ms^-2
  B) 1.8 ms^-2
  C) 5.0 ms^-2
  D) 5.4 ms^-2
  E) 25.0 ms^-2
  Show Answer
  The correct answer is B.
• Question 497: A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms^-1] Options:
  A) 1320m
  B) 660m
  C) 400m
  D) 330m
  E) 165m
  Show Answer
  The correct answer is B.
• Question 498:

  Notes of the same frequency sounded on a piano and on a flute may differ inI. pitch

  II. quality

  III. Loudness

  Options:
  A) I only
  B) II only
  C) I and III only
  D) II and III only
  E) I, II and III
  Show Answer
  The correct answer is D.
• Question 499: Electric motor primarily converts Options:
  A) electrical energy into chemical energy
  B) electrical energy into heat energy
  C) kinetic energy into potential energy
  D) electrical energy into mechanical energy
  E) mechanical energy into light energy
  Show Answer
  The correct answer is D.
• Question 500: Which of the following is a percussion instrument? Options:
  A) Flute
  B) Organ
  C) Bell
  D) Piano
  E) Sonometer
  Show Answer
  The correct answer is C.