2023 WAEC Physics Practical Questions and Answers

(Physics Paper 3)

2023 WAEC Physics Practical Answers: Get WAEC 2023 Physics Practical Questions and answers (2023 WAEC Physics Practical Expo) for 2023 Paper 3 (Practical).

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The 2023 WAEC Physics Practical (Paper 3) examination will take place on Tuesday, 30th May, 2023 from 9:30AM to 12:15PM (2Hour 45 Minutes).

WAEC 2023 Physics Practical Answers

Table of values
E= 3.0v

[TABULATE]
S/N: 1| 2| 3| 4| 5|

L(cm): 10.0| 20.0| 30.0| 40.0| 50.0|

V(v): 2.60| 2.10| 1.90| 1.40| 1.30|

V⁻¹(v⁻¹): 0.385| 0.476| 0.588| 0.714| 0.769

(3ax)

(3axi)
Slope= ∆V⁻¹(v⁻¹)/∆L(cm)
Slope= (0.79 – 0.33)/(85-4)
Slope= 0.46/81
Slope= 0.00568 v⁻¹cm⁻¹

Intercept c = 0.31v⁻¹

(3axii)
K = C⁻¹
K = 1/C
K = 1/0.31
K = 3.23volts

(3axiii)
(i) I ensured tight connections
(ii) I opened the key when reading is not being taken

(3bi)
The electromotive force (EMF) of a cell represents its maximum voltage potential when not connected to a circuit, whereas the potential difference (PD) across the cell is the actual voltage measured when it’s connected to a circuit, taking into account the resistance of the circuit and the cell itself.

(3bii)
E₁ – 1.5r₁ E₂ = 1.5r
E= E₁= E₂= 1.5v
Rₜ= V/I =1.5/0.6=2.5π
¹/rₜ=¹/r₁ + ¹/r₂ = ¹/r + ¹/r => ¹/rₜ = ²/r => rₜ = ²/r

Effective circuit resistance (Rᵣ) = R + rₜ
2.5 = 2+r/2
r/2 = 2.5 – 2
r/2 = 0.5
r=2*0.5
r=1π

PRECAUTIONS (Number 1)
(1)
I ensure that I securely fasten the retort stands and pulleys
(2)
I ensure that I check the integrity of the twine and pulleys

PRECAUTIONS (Number 2)

(1)

I avoided error of parallax in aligning the optical pins P₃ and P₄ with pins P₁ and P₂ as well as in taking measurement on the protractor.

(2)

I ensure that the optical pins are placed vertically.

PRECAUTIONS (Number 3)

(1) I would ensure clean terminals and tight connections

(2) I would open the key when readings are not being taken.

The electromotive force (EMF) of a cell represents its maximum voltage potential when not connected to a circuit, whereas the potential difference (PD) across the cell is the actual voltage measured when it’s connected to a circuit, taking into account the resistance of the circuit and the cell itself.

(6a)
(i)Register: A small amount of on-chip memory that stores data temporarily while it is being processed. Registers are the fastest memory locations and are used to store instructions, data, and addresses.

(ii)Clock: A timing device that generates a clock signal to synchronize the CPU’s operations. The clock speed measures the number of cycles per second.

(iii)Bus: A communication pathway that allows different components of the CPU to exchange data. Buses are used to connect registers, ALU, and other CPU components.

(6bi)
(i)Cyberbullying and online harassment, which can lead to mental health issues and social isolation.
(ii)Misinformation and disinformation, which can spread quickly and lead to confusion, mistrust, and harmful decisions.

(6bii)
(i)LAN (Local Area Network)
(ii)WAN (Wide Area Network)
(iii)MAN (Metropolitan Area Network)
(iv)WLAN (Wireless Local Area Network)

(4a)
(i) Videoconference:
Videoconferencing allows people in different locations to hold face-to-face meetings without having to move to a single location physically. It is widely used for business meetings, distance education, and medical consultations. Participants can see and hear each other in real-time through video and audio communication, share documents, and collaborate effectively.

(ii) Telepresence:
Telepresence refers to technologies that allow a person to feel as if they were present at a location other than their true location. It often involves sophisticated video conferencing equipment that provides high-definition video and audio, making it seem like participants are in the same room. Telepresence aims to create a more immersive and realistic interaction, enhancing remote communication.

(iii) Teleconference:
Teleconferencing is a telephone meeting among two or more participants involving technology more sophisticated than a simple two-way phone connection. It may involve audio, video, and data sharing. Teleconferencing is used for business meetings, training sessions, and seminars, enabling people to connect and collaborate without the need for physical travel.

(4b)
10 LET sum = 0
20 FOR i = 11 TO 50 STEP 2
30 LET sum = sum + i
40 NEXT i
50 PRINT “The sum of odd numbers from 11 to 50 is “; sum
60 END

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