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Author Topic: Waec 2021/2022 PHYSICS -PRACTICAL ANSWERS  (Read 719 times)

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Offline NORTOLA

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Waec 2021/2022 PHYSICS -PRACTICAL ANSWERS
« on: September 24, 2021, 10:09:19 am »
PHYSICS -PRACTICAL ANSWERS

Offline NORTOLA

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Re: Waec 2021/2022 PHYSICS -PRACTICAL ANSWERS
« Reply #1 on: September 24, 2021, 10:27:41 am »
QUESTION 1

=====================================

(1bi)
The period of an oscillatory motion is the time taken for a body to complete one oscillation.

(1bii)(Pick any two)
-TABULATE-
(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.

Offline NORTOLA

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Re: Waec 2021/2022 PHYSICS -PRACTICAL ANSWERS
« Reply #2 on: September 24, 2021, 10:29:42 am »
================
(3av)
Tabulate

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)^- ||3.333 ||2.857 ||2.500 || 2.222||2.000 ||

(3avii)
from the graph, Slope s, = ∆d/∆I^-
= 71 - 20 3 - 1.75
= 51/1.25
= 40.8cmA
Or 0.408Am

(3aviii)
(i) I ensured tight connections
(ii) I avoided error due to parallax while reading the ammeter

(bi)
(i) Straight at the magnetic field
(ii) The number of turns of it's coils

(3bii)
Given:
Diameter d, = 0.6cm = 610^-m
Resistivity, e = 1.010^-6 Ωm
Resistance R = 4Ω

Using R = eL/A
L=RA/e
= Rπd/4e
= 4 22/7 36 10^-6    4   1 10^-⁶
= 22/7 36
= 113.14m
:. L = 113.14metres


Typing......

 

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