Author Topic: WAEC 2022 PHYSICS PRACTICAL ANSWERS (Read 724 times)

MANDINHO · « **on:** May 30, 2022, 11:51:39 am »

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MANDINHO · « **Reply #1 on:** May 30, 2022, 11:54:04 am »

WAEC 2022 PHYSICS PRACTICAL SPECIMEN

QUESTION 1
-Metre rule
-Knife edge
-A piece of string
-A weighing balance
-A weight hanger
- A set of masses, M = (20g, 40g, 60g, 80g and 100g)

QUESTION 2
-Deep transparent vessel filled with water
-Vernier calipers
-Standand Masses, m = (2g, 5g and 10g)
-A piece of string
-Forceps (To be used to pick masses placed inside the boiling tube)
-Source of heating

Additional Information:
(a) Test tube or boiling tube of the following dimensions:
Length: at least 14cm
External diameter: 2.5cm

The teacher should:
(b) Use starch to fix a strip of graph sheet marked in centimeters inside the boiling tube or test tube. The 0 centimeter mark of the scale should be at the bottom of the tube.

(c) Place sufficient amount of dry sand or lead shot in the test tube or boiling tube to make it just float, when that is done, pour it into a small polythene and seal it. Push the sealed sand or lead shot to the bottom of the tube.

QUESTION 3
-Jockey
-2 dry cells(1.5v each) connected in series;
-Connecting leads should be provided for the battery
-Ammeter(0 - 2A)
-Potentiometer
-Key/switch
-Standard resistor, R of resistance 2ohms
-Connecting wires.

MANDINHO · « **Reply #2 on:** May 31, 2022, 10:10:44 am »

ANSWERS COMING..BE PATIENT

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MANDINHO · « **Reply #3 on:** May 31, 2022, 10:23:56 am »

PHYSICS PRACTICAL ANSWERS

(1)
Tabulate

Graph!

(1b and the rest)

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

(3)
Tabulate

-Precautions-
(i)I will avoid Parallax error was avoided on ammeter
(ii)I will ensure Key opened when reading was not being taken
(iii)I will avoid sliding of jockey on the potentiometer wire.

Graph!

(3b and rest)

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

Completed!.

Smartedu · « **Reply #4 on:** May 31, 2022, 10:41:50 am »

Thanks bro
More Grace

MANDINHO · « **Reply #5 on:** May 31, 2022, 11:17:08 am »

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MANDINHO · « **Reply #6 on:** May 31, 2022, 11:37:10 am »

NO.3 CORRECTED..... USE THE SOLUTIONS BELOW

(3vii)
[Tabulate]

(3ix)
Scale: d axis: 2cm to 10units
I-¹ axis: 2cm to 0.5units

(3x)
S = Δd/ΔI-¹
S = (66 - 20)/(3.0 - 1.7)
S = 35.38

(3xii)
I₀ = - 40.0cm

(3xiii)
E/δ = S
δ = E/S
δ = 3.0/35.38
δ = 0.085

(3xiii)
(i) I avoided parallax error on the ammeter
(ii) I ensured tight and neat connections.

(3bi)
R = pl/A
R = pl/A
Where: R - resistance
p - resistivity
L - length of the wire
A - cross sectional area of the wire

(3bii)
I = 0.75A
V = 240v
t = 10hours
Power = IV
Power = 0.75 x 240
Power = 180watts
Power= 0.18Kw
Energy = Power x Time
Energy = 0.18 x 10
Energy = 1.8Kwh
Cost = $0.50 x 1.8
Cost = $0.90

Earlyface

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Author Topic: WAEC 2022 PHYSICS PRACTICAL ANSWERS (Read 724 times)

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