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 1211: Which of the following instruments has a pure tone? Options:
  A) guitar
  B) vibrating strings
  C) tuning fork
  D) siren
  Show Answer
  The correct answer is C .
• Question 1212: If a solid X floats in liquids P of relative density 2.0 and in liquid Q of relative density 1.5, it can be inferred that the Options:
  A) weight of P displaced is greater than that of Q
  B) weight of P displaced is less than that of Q
  C) volume of P displaced is greater than that of Q
  D) volume of P displaced is less than that of Q
  Show Answer
  The correct answer is A .
• Question 1213: 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 1214: An object weighs 22 kg in water and 30kg in air. what is the upthrust exerted by the liquid on the object.
  [g = 10 ms²] Options:
  A) 50 N
  B) 520 N
  C) 220 N
  D) 80 N
  Show Answer
  The correct answer is D .
• Question 1215: In a large telecommunications auditorium, perforated absorbent materials are used to line the ceiling so as to Options:
  A) Increase the reverberation of sound in the hall
  B) increase the amount of echo in the hall
  C) reduce the hight of the ceiling from the floor
  D) reduce the reverberation of sound in the hall
  Show Answer
  The correct answer is D .
• Question 1216: If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT? Options:
  A) 4:01
  B) 1:04
  C) 5:01
  D) 2:01
  Show Answer
  The correct answer is A .
• Question 1217:

  ²³₁₁Na + Proton → ^p_qX + alpha particle

  What are the values of p and q respectively in the equation above?

  Options:
  A) 10 and 20
  B) 12 and 24
  C) 20 and 10
  D) 24 and 12
  Show Answer
  The correct answer is C .
• Question 1218: When the temperature difference between the wet and dry bulbs of a hygrometer is high, this indicates that Options:
  A) it is about to rain
  B) the relative humidity is high
  C) there is plenty of sunshine
  D) the relative humidity is low
  Show Answer
  The correct answer is D .
• Question 1219: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 1220: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .