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 1271: If the refractive index of a medium in air is 2.0, what is the critical angle for this medium? Options:
  A) 30^o
  B) 42^o
  C) 45^o
  D) 50^o
  Show Answer
  The correct answer is A .
• Question 1272: Which of the following statements about the compound microscope and astronomical telescope is (are) correct? i. the final image of a compound microscope is located at infinity ii. the final image of the astronomical telescope is always erect iii. the objective lens of a compound microscope has a very short focal length Options:
  A) i only
  B) ii only
  C) iii only
  D) i and iii
  E) ii and iii
  Show Answer
  The correct answer is C .
• Question 1273: Myopic defects in the human eye can be corrected through the use of a Options:
  A) Concave Mirror
  B) Concave lens
  C) Prism
  D) Convex lens
  Show Answer
  The correct answer is B .
• Question 1274: The north pole of a magnet can never be separated from the south pole because of the property knowledge as? Options:
  A) magnetic octopole
  B) magnetic monopole
  C) magnetic dipole
  D) magnetic quadrupole
  Show Answer
  The correct answer is C .
• Question 1275:

  I. Coherence
  II. Same frequency
  III. Same wavelength
  IV. Same Intensity

  Which of the conditions above are necessary to produce interference fringes?

  Options:
  A) I and III
  B) I, II and IV
  C) I, II and III
  D) II and III
  Show Answer
  The correct answer is C .
• Question 1276: Two liquids, P at a temperature of 20^oC and Q at a temperature of 80^oC have specific heat capacities of 1.0Jkg^-1oC^-1 and 1.5J kg^-1oC^-1respectively. if equal masses of P and Q are mixed in a lagged calorimeter, then the equilibrium temperature is Options:
  A) 44^oC
  B) 50^oC
  C) 56^oC
  D) 60^oC
  E) 70^oC
  Show Answer
  The correct answer is C .
• Question 1277:

  A magnet relay is a device used for?

  Options:
  A) reading the magnitude of magnetic flux
  B) controlling another circuit carrying larger current
  C) turning in sports
  D) storing magnetic field
  Show Answer
  The correct answer is B .
• Question 1278: Which of the following statements is true of the properties of a moving coil galvanometer? Options:
  A) THe coil has a small area
  B) There are strong hair springs to gives a large control panlel
  C) There is a strong permanent magnet to give high magnetic flux
  D) it has a small number of turns of coil
  Show Answer
  The correct answer is C .
• Question 1279: Electrical power is transmitted at a high voltage rather than low voltage because the amount of energy loss is reduced due to Options:
  A) heat dissipation
  B) production of eddy currents
  C) excessive current discharge
  D) excessive voltage distance
  Show Answer
  The correct answer is A .
• Question 1280:

  

  In the curve above, PQRST represents an alternating voltage of frequency 50Hz. The time interval between points P and R on the graph is

  Options:
  A) 25s
  B) 1/50s
  C) 1/100s
  D) 1/200s
  Show Answer
  The correct answer is C .