WAEC Physics Past Questions And Answers (Objective and Theory)
Section A: Physics WAEC Objective Questions
Question: What is the SI unit of electric current?
A) Watt
B) Ampere
C) Volt
D) Ohm
Answer: B) Ampere
Question: Which of the following is a vector quantity?
A) Speed
B) Mass
C) Acceleration
D) Temperature
Answer: C) Acceleration
Question: In a concave mirror, where is the image formed when the object is located between the focus and the mirror?
A) Beyond C
B) At F
C) Between F and C
D) Between C and mirror
Answer: A) Beyond C
Question: What happens to the resistance of a conductor if its temperature increases?
A) Increases
B) Decreases
C) Remains constant
D) Becomes zero
Answer: A) Increases
Question: The force acting on a body of mass 5 kg, which produces an acceleration of 2 m/s², is:
A) 5 N
B) 10 N
C) 2.5 N
D) 7.5 N
Answer: B) 10 N
Question: What is the formula for calculating mechanical advantage in a simple machine?
A) Velocity ratio / Efficiency
B) Load / Effort
C) Effort / Load
D) Load × Effort
Answer: C) Effort / Load
Question: Which of the following statements is true about a converging lens?
A) Always forms a virtual image
B) Diverges parallel rays of light
C) Forms both real and virtual images
D) Forms only real images
Answer: D) Forms only real images
Question: The phenomenon of radioactivity was first observed by:
A) Marie Curie
B) Ernest Rutherford
C) Henri Becquerel
D) Albert Einstein
Answer: C) Henri Becquerel
Question: What is the work done when a force of 20 N moves an object through a distance of 5 m in the direction of the force?
A) 100 J
B) 25 J
C) 4 J
D) 1 J
Answer: A) 100 J
Question: Which of the following is a unit of electric potential difference?
A) Volt
B) Joule
C) Ampere-hour
D) Watt
Answer: A) Volt
Section B: Physics WAEC Theory Questions
Question: Explain the concept of projectile motion and provide an example.
Answer: Projectile motion involves the motion of an object projected into the air, influenced only by gravity and air resistance. An example is a ball thrown horizontally.
Question: Define Hooke’s Law and explain its significance in the study of elasticity.
Answer: Hooke’s Law states that the force required to extend or compress a spring by a distance is proportional to that distance. It is vital in understanding the behavior of materials under deformation.
Question: Describe the process of nuclear fission and its applications.
Answer: Nuclear fission is the splitting of a heavy atomic nucleus into two lighter nuclei. Its applications include nuclear power generation and nuclear weapons.
Question: Explain the term electromagnetic induction and provide an example.
Answer: Electromagnetic induction is the generation of an electromotive force in a conductor by a changing magnetic field. An example is a coil moving in and out of a magnetic field, inducing a current.
Question: Discuss the principles behind the operation of an optical fiber in communication.
Answer: Optical fibers use total internal reflection to transmit light signals through thin glass fibers, enabling high-speed and long-distance communication.
