Get 2025 free WAEC GCE Physics exam questions and answers Obj/Essay. Law of motion, energy.. ..Verified WAEC 2025 GCE Physics practical /obj/essay Questions and Answers
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WAEC GCE physics objective and Essay Questions and answers
SECTION A: OBJECTIVE QUESTIONS (MCQs)
1. The unit of force in the SI system is:
A. Joule
B. Newton ✅
C. Pascal
D. Watt
Answer: B. Newton
2. The law of conservation of energy states that:
A. Energy can be created and destroyed
B. Energy cannot be transferred
C. Energy cannot be created or destroyed, only transformed ✅
D. Energy is always lost in transformation
Answer: C
3. Which of the following materials is a good conductor of electricity?
A. Rubber
B. Copper ✅
C. Glass
D. Wood
Answer: B
4. The speed of light in vacuum is approximately:
A. 3 × 10⁶ m/s
B. 3 × 10⁸ m/s ✅
C. 3 × 10⁵ m/s
D. 3 × 10⁷ m/s
Answer: B
5. Which instrument is used to measure electric current?
A. Voltmeter
B. Ammeter ✅
C. Galvanometer
D. Ohmmeter
Answer: B
6. A freely falling body accelerates at a rate of:
A. 5 m/s²
B. 9.8 m/s² ✅
C. 10 m/s
D. 1 m/s²
Answer: B
7. The focal length of a convex lens decreases when:
A. Lens is immersed in water ✅
B. Lens is heated
C. Lens is cooled
D. Lens is moved closer to the object
Answer: A
8. Which of the following quantities is a scalar?
A. Force
B. Velocity
C. Speed ✅
D. Acceleration
WAEC GCE Physics questions and answers 2025 obj/essay
Answer: C
9. The pressure exerted by a fluid in a container depends on:
A. Density, height, and gravity ✅
B. Volume only
C. Temperature only
D. Mass only
Answer: A
10. The instrument used to measure atmospheric pressure is:
A. Thermometer
B. Barometer ✅
C. Hydrometer
D. Hygrometer
Answer: B
SECTION B: ESSAY QUESTIONS
1. Define Physics and explain its branches
Answer:
Physics is the branch of science that studies matter, energy, and the interactions between them.
Branches:
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Mechanics: Motion and forces (e.g., Newton’s laws)
-
Thermodynamics: Heat and temperature
-
Optics: Light and its behavior
-
Electricity and Magnetism: Electric charges, currents, and magnetic fields
-
Modern Physics: Atomic, nuclear, and quantum physics
2. State and explain Newton’s three laws of motion
-
First Law (Law of Inertia): A body remains at rest or in uniform motion unless acted upon by an external force.
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Second Law: Force equals mass times acceleration (F = ma).
-
Third Law: For every action, there is an equal and opposite reaction.
3. Explain energy transformation with examples
Answer:
Energy can neither be created nor destroyed, only transformed.
Examples:
-
Chemical energy in fuel → Thermal energy in engine → Kinetic energy of car
-
Electrical energy → Light energy in a bulb
-
Mechanical energy → Sound energy in a piano
4. Refraction of Light
-
Refraction is the bending of light when it passes from one medium to another.
-
Laws of Refraction:
-
Incident ray, refracted ray, and normal lie in the same plane.
-
The ratio of sine of angle of incidence to sine of angle of refraction is constant (Snell’s Law).
-
5. Simple Harmonic Motion (SHM)
Definition: Motion in which acceleration is directly proportional to the displacement and opposite in direction.
Examples:
-
Pendulum
-
Mass-spring system
Formula: a=−ω2xa = -\omega^2 x
6. Practical Tips for WAEC Physics
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Always show step-by-step calculations.
-
Label all diagrams clearly.
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Use standard SI units.
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For practical questions, record observations before conclusions.