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“”WAEC 2021 PHYSICS PRACTICAL ANSWERS””
The period of an oscillatory motion is the time taken for a body to complete one oscillation.
(1bii)(Pick any two)
(i)Mass is a scalar quantity WHILE weight is a vector quantity.
(ii)The SI unit of mass is the kilogram (kg) WHILE the SI unit of weight is Newton (N).
(iii)Mass is the measure of the amount of matter present a body WHILE weight is the measure of the amount of force that acts on mass because of the pull of gravity.
S/N ||1 || 2 || 3 || 4 || 5
d(cm) || 80.00|| 70.00 || 50.00 || 40.00 || 30.00
I(A) || 0.30||0.35 || 0.40|| 0.45||0.50 ||
(I)^-¹ ||3.333 ||2.857 ||2.500 || 2.222||2.000 ||
from the graph, Slope s, = ∆d/∆I^-¹
= 71 – 20 ÷ 3 – 1.75
(i) I ensured tight connections
(ii) I avoided error due to parallax while reading the ammeter
(i) Straight at the magnetic field
(ii) The number of turns of it’s coils
Diameter d, = 0.6cm = 6×10^-³m
Resistivity, e = 1.0×10^-6 Ωm
Resistance R = 4Ω
Using R = eL/A
= 4 × 22/7 × 36 × 10^-6 ÷ 4 × 1 × 10^-⁶
= 22/7 × 36
:. L = 113.14metres
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