Physics WAEC Past Exam Questions & Answers for Nigeria SS3 2026.

1. When two like charges are brought together, the potential energy of the system formed will

2. Which of the following quantities is not a vector?

3. Two charged particles, each of charge q, are separated by a distance, d, in a vacuum. If a repulsive force of 100.0 N acts on the particles, determine d. [(4πϵ₀)⁻¹ = 9.0 × 10⁹ N m² C⁻²]

4. The p.d. across a 1.5 V cell drops to 1.3 V when it delivers a current of 0.40 A through a circuit. What is the internal resistance of the cell?

5. At what rate is energy converted in the cell from chemical to electrical?

6. Magnetic relay is used for

7. A transverse wave can be distinguished from a longitudinal wave by

8. A potential of 500.0 V is applied to a series combination of 4.0 × 10⁻⁶ F and 6.0 × 10⁻⁶ F capacitors. Determine the charge on each capacitor.

9. Which of the following factors affects the rate of evaporation of a liquid?
I. Exposed surface area
II. Temperature of the surroundings
III. Thermal capacity of the liquid
IV. Relative humidity of the surroundings

10. Which of the following statements about the intensity of sound waves in air is true? It is proportional to