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 1181: When white light is dispersed by a spectrometer, the component having the shortest wavelength is Options:
  A) orange
  B) green
  C) violet
  D) red
  Show Answer
  The correct answer is C .
• Question 1182:

  A source of sound produces waves in air of wavelength1.65m. If the speed of soundin air is 330ms${}^{-1}$, the period of vibration in air is?

  Options:
  A) 200
  B) 0.005
  C) 0.5
  D) 0.02
  Show Answer
  The correct answer is B .
• Question 1183:

  

  The wave motion above has a frequency

  Options:
  A) 0.1Hz
  B) 0.2Hz
  C) 5Hz
  D) 10Hz
  E) 100Hz
  Show Answer
  The correct answer is C .
• Question 1184: A lorry travels 10km northwards, 4km eastwards, 6km southwards, 4km westwards to arrive at a point T. What is the total displacement? Options:
  A) 6km south
  B) 4km north
  C) 6km north
  D) 4km east
  Show Answer
  The correct answer is B .
• Question 1185: Two tuning forks of frequency 256Hz and 260Hz are sounded close to each other. What is the frequency of the beats produced? Options:
  A) 2Hz
  B) 4Hz
  C) 8Hz
  D) 258Hz
  Show Answer
  The correct answer is B .
• Question 1186:

  Transformers are designed so that energy losses are reduced to a minimum. This is achieved through those process.I. Using a soft iron ore

  II. Laminating the iron core to reduce energy loses due to eddy current

  III. Designing an efficient iron core

  Options:
  A) I & II only
  B) II only
  C) I, II, & III only
  D) III only
  Show Answer
  The correct answer is C .
• Question 1187: A wire P has half the diameter and half the length of a wire Q of similar material. The ratio of the resistance of P to that of Q is Options:
  A) 8 : 1
  B) 4 : 1
  C) 2 : 1
  D) 1 : 1
  E) 1 : 4
  Show Answer
  The correct answer is C .
• Question 1188: The range of wavelengths of the visible spectrum is 400nm - 700nm. The wavelength of gamma rays is Options:
  A) longer than 700nm
  B) shorter than 700nm but longer then 400nm
  C) 550nm
  D) shorter than 400nm
  E) infinite
  Show Answer
  The correct answer is D .
• Question 1189: The net charge on the atom is zero because Options:
  A) the electrons and the protons that are charged are in the nucleus
  B) the total charge on the electrons is equal to the total charge on the protons
  C) the neutrons from a shield around the charged protons
  D) the number of electrons in an atom is half the number of protons
  E) A and B above
  Show Answer
  The correct answer is B .
• Question 1190:

  I.Chemical
  II.Sound
  III.Electricity

  Which of the above forms of energy can directly be converted to light energy?

  Options:
  A) I and II only
  B) II and III only
  C) I, II and III
  D) I and III only
  Show Answer
  The correct answer is D .