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 1651: A spring of length 25cm is extended to 30cm by a load of 150N attached to one of its end, what is the energy stored in the spring? Options:
  A) 3750J
  B) 2500J
  C) 3.75J
  D) 2.50J
  Show Answer
  The correct answer is C .
• Question 1652: The range of accommodation of a normal human eye is Options:
  A) 0m to 0.1m
  B) 0m to 0.25m
  C) 0.10m to 0.25m
  D) 0.10m to infinity
  E) 0.25m to infinity
  Show Answer
  The correct answer is E .
• Question 1653: Which of the following can be used to reduce local action in a Laclanche cell? Options:
  A) A carbon rod as the positive pole
  B) Pure zinc as the negative pole
  C) Potassium permanganate solution in contact with the positive pole
  D) common salt solution
  Show Answer
  The correct answer is C .
• Question 1654:

  A lead bullet of mass 0.05kg is fired with a velocity of 200ms${}^{-1}$ into a block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is?

  Options:
  A) 50J
  B) 100J
  C) 150J
  D) 200J
  Show Answer
  The correct answer is A .
• Question 1655:

  

  Two mirrors of the same length are arranged as shown above, a ray of light NO strikes the system at O and emerges along PQ. The emergent ray has been deviated through

  Options:
  A) 220 degrees
  B) 200 degrees
  C) 210 degrees
  D) 180 degrees
  E) 230 degrees
  Show Answer
  The correct answer is D .
• Question 1656: When an ebolite rod is rubbed with fur, it has Options:
  A) no charge at all
  B) a negative charge
  C) a positive charge
  D) negative and positive charges
  Show Answer
  The correct answer is B .
• Question 1657: Under constant tension and constant mass per unit length, the note produced by a plucked string is 500Hz when the length of the string is 0.90m. At what length is the frequency 150Hz? Options:
  A) 3m
  B) 4m
  C) 5m
  D) 6m
  Show Answer
  The correct answer is A .
• Question 1658:

  Particles of mass 10${}^{-2}$kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad${}^{-1}$. If the radius of the blade is 0.2m, the centripetalforce is?

  Options:
  A) 2N
  B) 20N
  C) 200N
  D) 400N
  Show Answer
  The correct answer is B .
• Question 1659: A cell of e.m.f 2V and internal resistance 1$\mathrm{\Omega }$ supplies a current of 0.5 amps to a resistance whose value is Options:
  A) 0.5$\mathrm{\Omega }$
  B) 1$\mathrm{\Omega }$
  C) 2$\mathrm{\Omega }$
  D) 2.5$\mathrm{\Omega }$
  E) 3$\mathrm{\Omega }$
  Show Answer
  The correct answer is E .
• Question 1660: A spring of force constant 1500Nm^-1 is acted upon by a constant force of 75N. Calculate the potential energy stored in the string Options:
  A) 1.9J
  B) 2.8J
  C) 3.45J
  D) 0.43J
  Show Answer
  The correct answer is A .