kemagnetan
TRANSCRIPT
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1.1. PermanenPermanen 2.2. TemporerTemporer
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Magnet selaluMagnet selaluberkutub berkutub gandaganda
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Membuat magnet dengan cara menggosokMembuat magnet dengan cara induksiMembuat magnet dengan cara menggunakan arus listrik
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1. MENGGOSOK MENGGOSOK
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CARA MEMBUAT MAGNET
1.MENGGOSOK
Ujung berawalnya gosokan akan mendapat kutub yang sejenis dengan kutub magnet yang menggosoknya.
Perc. ke
kutub L
ujung P
ujung Q
(1) K. utara
K. utara
K. selatan
(2) K. selatan
K. selatan
K. utara
Jenis kutub magnet L yang digosokkan dan kutub magnet besi P dan Q yang dihasilkan dalam percobaan dicatat dalam tabel berikut :
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2. INDUKSI
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2. INDUKSI
Paku besi YZ didekatkan dengan magnet batang , kemudian paku besi PQ didekatkan pada paku YZ. Jenis kutub magnet yang dihasilkan oleh ujung ujung paku adalah :
Y Z P QKutub Utara
Kutub Selatan
Kutub Utara
Kutub Selatan
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DI DALAM KUMPARAN BERARUS LISRTIK DC
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3. DI DALAM KUMPARAN BERARUS LISRTIK DC
Kutub magnet yang dihasilkan Sifat magnet yang
ditimbulkanUjung K Ujung L
Kutub utara
Kutub selatan
Baja : PermanenBesi : sementara
KAIDAH TANGAN KANAN :Tangan Kanan digengganmIbu Jari : Kutub UtaraKuku-kuku jari : arah aruas listrik
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Kutub sejenis tolak menolakKutub tidak sejenis tarik menarik
benang
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GAYA LORENTZ
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Aturan Tangan Aturan Tangan KiriKiri
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Aturan Tangan Aturan Tangan KiriKiri
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1. Motor Listrik
energi listrik – medan magnet induksi – energi mekanikenergi listrik – medan magnet induksi – energi mekanik
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2. Generator Listrik
energi mekanik – perubahan medan magnet – energi listrikenergi mekanik – perubahan medan magnet – energi listrik
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Listrik GGL induksi
SEBUTKAN BAGIAN-BAGIAN UTAMA PADA GENERATOR?
1.Kumparan. a.luas penampang(A)
b.jumlah lilitan(N)2.Magnet medan magnet (B)
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1.Jumlah lilitan(N). 2.Perubahan jumlah garis gaya magnet tiap
detik (kecepatan putaran kumparan )
GGL induksi maksimum dipengarui oleh : 1.Jumlah lilitan(N) 2.Luas penampang(A) 3.Induksi magnet (B)
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3. Transformator
Step Up
Step Down
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1.Kumparan primer. Jumlah kumprn(N1)
2.Kumparan skunder jumlh kumprn(N2)
3.Inti besi.
4.In put. Arus(I1),daya(P1),tegangan(V1)
5.Out put. Arus(I2),daya(P2),tegangan(V2)
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Daya input = Daya output.P1 = P2
I1.V1 = I2 .V2
HUBUNGAN ANTARA;N,I danV a. V1:V2 =N1: N2
b. V1:V2 = I2: I1
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1.Transformator akan dapat berfungsi,bila arus
listrik yang mengalir arus AC.2.Transformator akan dapat berfungsi pada
arus DC , bila diberi alat interuptor.
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TERIMA KASIH