
KEMAGNETAN
Presentation
•
Science
•
9th Grade
•
Hard
kartinineni haja
Used 5+ times
FREE Resource
9 Slides • 0 Questions
1
By kartinineni haja
2
1.Sifat dan kutub magnet
2.Cara membuat dan menghilangkan sifat kemagnetan
3.Teori kemagnetan
4.Medan magnet
5.Gaya lorentz
6.Sistem navigasi hewan
By kartinineni haja
3
A.1. Sifat dan kutub magnet
Ø Magnet permanen
Ø Magnet sementara
Magnet permanen
Sebuah magnet dapat menyebabkan benda – benda bersifat logam yang berada di sekitarnya tertarik.Gaya yang menyebabkan tertarik atau tertolaknya benda tersebut disebut gaya magnetik
By kartinineni haja
4
Berdasarkan sifat magnetiknya jenis bahan di bagi menjadi tiga yaitu
bahan diamagnetik,bahan paramagnetik,dan bahan ferromagnetik.
Berdasarkan bentuknya magnet terdidri atas empat jenis,ada yang berbentuk U,ladam atau tapal kuda,magnet batang dan magnet yang berbentuk jarum.
By kartinineni haja
5
Magnet sementara
Magnet permanen pada umumnya terbuat dari logam keras,sehingga dapa t menyimpan sifat magnet lebih lama,magnet sementara pada umumnya terbuat dari logam lunak,sehingga tidak dapat menyimpan sifat magnet ke dalam waktu lama.
By kartinineni haja
6
1. Jelaskan pengertian gaya magnetik
2. Mengapa magnet mempunyai dua kutub?
3. Tuliskan masing – masing dua contoh :
a.ferromagnetik
b.diamagnetik
4. Tuliskan cara
menghilangkan sifat
kemagnetan
By kartinineni haja
7
Cara menghilangkan sifat kemagnetan :
1.dibakar
2.di pukul pukul
3.diberi arus listrik
By kartinineni haja
8
Cara menghilangkan sifat kemagnetan :
1.dibakar
2.di pukul pukul
3.diberi arus listrik
By kartinineni haja
9
TUGAS
1. Jelaskan pengertian gaya magnetik
2. Mengapa magnet mempunyai dua kutub?
3. Tuliskan masing – masing dua contoh :
a.ferromagnetik
b.diamagnetik
4. Tuliskan cara menghilangkan sifat
kemagnetan
By kartinineni haja
By kartinineni haja
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