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 11:

  One of the following readings represents the measurement of thelength of a metal rod using vernier callipers. Taking the reading accuracy into consideration, the most likely one is

  Options:
  A) 5.16cm
  B) 5.165cm
  C) 5.0cm
  D) 5.160cm
  Show Answer
  The correct answer is A .
• Question 12: The main function of the commutator in a simple d.c. motor is to Options:
  A) enable the armature to rotate freely
  B) increase the flux linking the armature windings
  C) maintain a direct current in the armature
  D) provide uniform magnetic field around the armature
  E) reverse the direction of the current in the armature.
  Show Answer
  The correct answer is E .
• Question 13: In a nuclear fusion process, four protons each of mass M_p were fused to produce a nucleus X of mass M_x. Which of the following equations is CORRECT? Options:
  A) 4M_p > M_x
  B) 4M_p = M_x
  C) 4M_p< M_x
  D) M_p > M_x
  Show Answer
  The correct answer is B .
• Question 14:

  A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is?

  Options:
  A) 3m
  B) 5m
  C) 6m
  D) 10m
  Show Answer
  The correct answer is C .
• Question 15: Which of the following gas laws is equivalent to the work done? Options:
  A) Boyle' law
  B) Charles law
  C) Pressure law
  D) van der Waal's law
  Show Answer
  The correct answer is A .
• Question 16: A boy on looking into a mirror observed that his face appeared to have grown bigger. The boy must have been looking at a Options:
  A) convex mirror with his face at the focus
  B) concave mirror with his face between the focus and the mirror
  C) concave mirror with his face at the focus
  D) convex mirror with his face between the focus and the mirror
  Show Answer
  The correct answer is B .
• Question 17: Of the following which is different from the other? Options:
  A) x-rays
  B) gamma-rays
  C) cathode rays
  D) ultra violet rays
  E) infrared rays
  Show Answer
  The correct answer is C .
• Question 18: Calculate the amount of heat generated in an external load of resistance 8Ω if an alternating current of peak value 5 A is passed through it for 100s. Options:
  A) 2.0 × 10⁴J
  B) 1.0 × 10⁴J
  C) 5.0 × 10³J
  D) 4.0 × 10³J
  E) 2.0 × 10²J
  Show Answer
  The correct answer is A .
• Question 19: A series RLC circuit is said to resonate, when Options:
  A) capacitive reactance is zero
  B) conductance is maximum
  C) current is minimum
  D) impedance is minimum
  E) inductive reactance is zero
  Show Answer
  The correct answer is D .
• Question 20: A force of 500N¹ is applied to a steel wire of cross-sectional area 0.2m², The tensile stress is Options:
  A) 2.5x10⁴Nm^-2
  B) 1.0x10²Nm^-2
  C) 1.0x10³Nm^-2
  D) 2.5x10³Nm^-2
  Show Answer
  The correct answer is D .