WAEC 2026 PHYSICS PRACTICAL QUESTIONS
WAEC 2026 PHYSICS PRACTICAL SPECIMENS BELOW
WAEC 2026 PHYSICS PRACTICAL QUESTIONS BELOW
SOLUTIONS BELOW
NUMBER 1
NUMBER 2
2a
(xviii)
(PICK ANY TWO)
(i) Stir the water continuously to ensure uniform temperature.
(ii) Take thermometer readings at eye level to avoid parallax error.
(iii) Transfer the heated pendulum quickly into beaker B to minimize heat loss.
(iv) Ensure the thermometer does not touch the sides or bottom of the beaker.
(v) Read the temperature immediately after it becomes steady.
2(bi)
Specific heat capacity is the amount of heat energy required to raise the temperature of unit mass (1 kg) of a substance by 1 K (or 1°C).
(bii)
Given:
Mass of copper ball, m₁ = 50 g =
0.05 kg
Specific heat capacity of copper, c₁ = 400 J kg⁻¹ K⁻¹
Initial temperature of copper = 100°C
Initial temperature of water = 23°C
Final temperature of mixture = 62°C
Specific heat capacity of water, c₂ = 4200 J kg⁻¹ K⁻¹
Heat lost by copper = Heat gained by water
m₁c₁(100 − 62) = m₂c₂(62 − 23)
0.05 × 400 × 38 = m₂ × 4200 × 39
760 = 163800m₂
m₂ = 760/163800
m₂ = 0.00464 kg
Mass of water = 0.00464 kg or 4.64g
NUMBER 3
3bi
Rheostat is an adjustable resistor that is used in applications that demand current modification or resistance variation in an electric circuit. The rheostat may control the speed of motors, modify generator characteristics, and dim lights.
3bii) (PICK ANY TWO)
Lenght of wire
Material of wire
Temperature
Cross sectional Area
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