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 1191: In a semi conductor junction diode, as the depletion or barrier layer is forward-biased, the layer Options:
  A) widens
  B) narrows
  C) remains constant
  D) widens then narrows
  Show Answer
  The correct answer is C .
• Question 1192:

  A turning fork of frequency 340Hz is vibrated just above a cylindrical tube of height 1.2m. If water is slowly poured into the tube, at what maximum height will resonance occur.

  [speed of sound in air = 340ms^-1]

  Options:
  A) 0.95m
  B) 0.60m
  C) 0.50m
  D) 0.45m
  Show Answer
  The correct answer is D .
• Question 1193: A bullet fired vertically from upward from a gun held 2.0 m above the ground reaches its maximum height in 4.0s. calculate its initial velocity.
  [g = 10ms^-2] Options:
  A) 10 ms^-1
  B) 8 ms^-1
  C) 40 ms^-1
  D) 20 ms^-1
  Show Answer
  The correct answer is C .
• Question 1194: Which of the following elements are real magnetic materials? Options:
  A) Iron, steel and nickel
  B) copper, steel and iron
  C) lead, iron and brass
  D) glass, lead and steel
  E) stone, air and iron
  Show Answer
  The correct answer is A .
• Question 1195:

  An object is acted upon by a system of parallel three causing the object to be in state equilibrium. Which of the following statement is not correct

  Options:
  A) the resultant of the parallel forces is zero
  B) the algebraic sum of all the moments of the forces is zero
  C) all the parallel forces must be equal in magnitude and direction
  D) the sum of forces in one direction must be equal to the sum of forces in the opposite direction
  Show Answer
  The correct answer is C .
• Question 1196: A charge of one coulomb liberates 0.0033g of copper in an electrolytic process. How long will it take a current of 2A to librate 1.98g of copper in such a process? Options:
  A) 5 mins
  B) 30 mins
  C) 50 mins
  D) 60 mins
  E) 120 mins
  Show Answer
  The correct answer is A .
• Question 1197: Which of the following types of motion are oscillatory? i.a diving board when used by a diver. ii. the motion of the balance wheel of a wrist watch. iii. the motion of the turn-table of a record player. iv. the motion of the center of a ten kobo piece as it rolls down an inclined plane. v. the motion of the needle of a D.C. ammeter into which a low A.C. current is passed Options:
  A) i and ii
  B) i, ii and iii
  C) ii, ii and iv
  D) i, ii and v
  E) iii, iv and iv
  Show Answer
  The correct answer is A .
• Question 1198:

  The equation of a wave traveling along the positive x-direction is given by; y = 0.25 x 10${}^{-3}$ sin (500t - 0.025x). Determine the angular velocityof the wave motion.

  Options:
  A) 0.25 x 10${}^{-3}$rads${}^{-1}$
  B) 0.25 x 10${}^{-1}$rads${}^{-1}$
  C) 5.00 x 10${}^2$rads${}^{-1}$
  D) 2.50 x 10${}^3$rads${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 1199: Two objects, one having three times the mass of the other, are dropped at the same time from a tall building. When they are above the ground, the two objects will have the same Options:
  A) Momentum
  B) Kinetic energy
  C) Potential energy
  D) Acceleration
  Show Answer
  The correct answer is C .
• Question 1200:

  If the fraction of the atoms of a radioactive material left after 120years is $\frac{1}{64}$, what is the half-life of the material?  $\frac{1}{64}$

  Options:
  A) 20 years
  B) 10 years
  C) 2 years
  D) 24 years
  Show Answer
  The correct answer is A .