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MODUL • Fizik TINGKATAN 5

Teknik Menjawab [Format Kertas 2 : Kefahaman / Esei Pendek]
Answering Technique [Paper 2 Format : Comprehension / Short Essay]

Soalan / Question: Jawapan / Answer:
1 Terangkan bagaimana sistem audio berfungsi. • Semasa bercakap melalui mikrofon, arus berubah-ubah
Explain how the audio system functions.
[4 markah / marks] dihasilkan
When speaking through the microphone, the varying current is produced

• Mikrofon: tenaga bunyi → tenaga elektrik
Microphone: sound energy → electric energy
• Arus berubah-ubah melalui kapasitor C 1 dan bercampur
R 1 R 2
C 2
9 V dengan I B , berlaku pertambahan kecil dalam I B
C I C The varying current passes through the capacitor C 1 and adds with I B ,
C 1
B Pembesar
suara causes the small increase in I B
I B Speaker
Mikrofon E • Apabila I a bertambah, I c juga bertambah
Microphone I E
When I a increases, I c also increases
• Berlaku amplifikasi arus
Current amplification occurs
• Pembesar suara: tenaga elektrik → tenaga bunyi
Speaker: electric energy → sound energy

2 Terangkan bagaimana lampu menyala pada waktu malam dan padam pada waktu siang secara automatik.
Explain how lamp lights up at night and switches off at daytime automatically.
UNIT 4
[4 markah / marks]

UNIT 4
Mentol
10 kΩ Bulb

C
B 6 V

E Maklumat tambahan:
Additional information:

PPC
LDR

Waktu malam / At night : Waktu siang / Daytime :
• Rintangan PPC bertambah / The resistance of LDR increases • Rintangan PPC berkurang / The resistance of LDR decreases

• VBE bertambah / V BE increases • VBE berkurang / V BE decreases
• IB bertambah / I B increases • IB berkurang / I B decreases
• IC bertambah / I C increases • IC berkurang / I C decreases
• Transistor dihidupkan / The transistor is switched on • Transistor dimatikan / The transistor is switched off

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