elektrik tingkatan satu
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BAB 3: ELEKTRIK
1. SUMBER DAN KEGUNAAN
2. ALATAN TANGAN
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SUMBER ELEKTRIK
• KEMAGNETAN
• TINDAKAN KIMIA
• CAHAYA
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1. KEMAGNETAN
• Prinsip tindakan magnet untuk menghasilkantenaga elektrik.
• Prinsip ini berdasarkan : ______________________________________________________________________________________________________________________________________________________________________________
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• Contoh :
a) Dinamo:
Arus elektrik terhasil apabila:
_______________________________________________________________________________________________________________________________________________________________________________________________________
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b) Turbin ialah : …………………………………………………………………………………………………………………………..
Arus elektrik terhasil apabila: ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….
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2. TINDAKAN KIMIA
• Contoh :
a) Sel kering:
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b) Sel Alkali
• Membekalkan tenaga elektrik dalam jangkamasa yang lebih lama berbanding sel biasa.
c) Sel Merkuri
• Sel bersaiz kecil (mahal)
• Digunakan untuk alat yang hanyamenggunakan arus rendah.
d) Sel Lithium
• Membekalkan arus tinggi
• Jangka hayat lama
• Boleh dicas semula
• Digunakan pada peralatan kecil(mudah alih)
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e) Sel Nikel Kadmium (Ni Cad)
• Digunakan pada peralatan tanpa wayar(codeless)
• Boleh dicas semula hingga 1000 kali
- peralatan khas yang membekalkan arusyang stabil dan mengelak litar pintas.
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f) Sel basah:
- kelebihan: ……………………………………………..
- dikenali juga : ………………………………………….
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3. CAHAYA • Fotovoltan :
…………………………………………………………………………………………………………………………………………………………………………………………………….
• Bahan separa pengalir;
a) _____________________
b) _____________________
c) _____________________
d) _____________________
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KEGUNAAN ELEKTRIK
• Tenaga Haba
• Tenaga Kinetik
• Tenaga Bunyi
• Tenaga Cahaya
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1. Tenaga Haba• Fungsi elemen pemanas:
…………………………………………………………………………………………….
• Fungsi termostat : …………………………………………………………………………………………….
• Elemen pemanas diperbuat daripada……………………………………
• Contoh alatan: ……………………………………….
………………………………………………………………………
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2. Tenaga Kinetik
• Dikenali juga : ………………………………………….
• Tenaga elektrik = Tenaga Kinetik denganmenggunakan ………………………………………….
• Contoh perkakasan: ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….
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3. Tenaga Bunyi:
• Contoh perkakas elektrik: …………………………………………………………………………………………………………………………………………………………………….
4. Tenaga Cahaya:
• Dua jenis lampu: 1) ___________________
2) __________________
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ALATAN TANGAN ELEKTRIK
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1. PENA UJIAN
FUNGSI:
1) ……………………………………………………………………………………….
2) ……………………………………………………………………………………….
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2. PLAYAR MUNCUNG TIRUS
• Fungsi :
a) …………………………………………………………
b) …………………………………………………………
c) …………………………………………………………
d) …………………………………………………………
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3. PLAYAR GABUNG
• Fungsi:
a) ………………………………………………………………
b) ………………………………………………………………
c) ………………………………………………………………
RAHANG
MATA PEMOTONG
PEMEGANG BERSALUT
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4. PEMOTONG SISI
• Fungsi :
a) ……………………………………………………………..
b) ……………………………………………………………..
Mata sisi
Pemegang bersalut
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5. PENJALUR WAYAR