Medan Listrik, Potensial Listrik, dan Kapasitor
95
4. Dielektrik pada Kapasitor
:2?D2B25E2A6=2D6A:?8A2522A2C:DB3:2C2?I25:C:C:A:5:A2C2?8 CE2DE3292?:C=2DBI2?85:C63ED 0.
292?:?:5:8E?22?2B6?2
52A2D6A6B36C2B?:=2: 2A2C:D2C2A2C:DB
?D93292?5:6=6DB: 252=29242:26BD2C52?2B6D
292?5:6=6DB:6:=::92B82A6B:D:F:D2CI2?836B365256?82? 92B82 A6B:D:F:D2C F2E
6B52C2B2? 6723
52A2D
5:6D29E:329G2A6B:D:F:D2C3292?
.
C69:?8822A2C:D2C2A2C:DB I2?86?88E?22?3292?5:6=6DB:252=29
2D2E
.
O 6?82?66B92D:2?6723
52?6723
5:52A2D9E3E?82?2A2C:DBD2?A25:6=6DB:52?2A2C:DB56?82?3292? 5:6=6DB:252=29C63282:36B:ED
.
O
-63E292A2C:DB6A:?8C6;2;2B=E2CD:2A6A:?84 52?D6BA:C29C2DE
C22=2:?
652AD6?C:2=5:2?D2B26A:?8
F=D
6E5:2?2A2C:DB5:=6A2C 52B:CE36BD682?82?52?BE2?85:2?D2B26A:?85::C:56?82?5:6=6DB:I2?86:=::
A6B:D:F:D2CB6=2D:73292? :DE?8=29
2
2A2C:D2CE=2 E=2 3
E2D2?-A252D:2A6A:?8
4
E2D652?=:CDB:C636=E5:36B:3292?5:6=6DB: 5
2A2C:D2C2A2C:DBC6D6=295:C:C:A:3292?5:6=6DB:
6
A6B:D:F:D2C5:6=6DB:I2?85:8E?22? 7
3652AD6?C:2=6A:?8C6D6=295:36B:3292?5:6=6DB:
8
E2D652?=:CDB:C6D6=295:36B:E2D2?5:6=6DB: :
:6D29E: P
O
P
O
4 P
O
2 3
-
P
O
0P
O
4
0
0
5
. .
P
O
P
O
6
.
P
O
P
O
Contoh
4.14
Jika permitivitas dielektrik disisipkan di antara keping kapasitor,
kapasitas dan beda potensialnya berubah, tetapi muatannya q tetap.
Ingatlah
Tugas Anda 4.3
Mengapa dielektrik tidak menggunakan bahan konduktor?
Coba tanya pada guru Anda atau cari informasi dari internet.
DIUNDUH DARI: WWW.BUKUPAKET.COM Sumber buku bse.kemdikbud.go.id
Mudah dan Aktif Belajar Fisika untuk Kelas XII
96
5. Kapasitor Bentuk Bola
+6B92D:2?26
E2E=:D?5EDB36B36?DE3=2I2?8 5:A:C292?BE2?8F2E
E=:D328:2?=E2B36BE2D2??682D:756?82?
;2B: ;2B:=E2B C652?82?E=:DI2?8C636=2952=236BE2D2?AC:D:7
56?82?;2B: ;2B: +D6?C:2=
A2523=2328:2?52=25:D:3E=2? =69E2D2?AC:D:7-52?E2D2?3=2328:2?=E2BO-
52AE?AD6?C:2=
52B:3=2?5EDB328:2?=E2B36B?:=2:?=2B6?25:D2?292? :D2 6D29E: 329G2 E2D 652? 52? AD6?C:2= =:CDB: =69 3=2
?5EDB5:D:D: 52?
6:=::A6BC222? 52?0
- -
O 6?82? 56::2? 3652 AD6?C:2= 2?D2B2 65E2 3=2 ?5EDB
36BE2D2?D6BC63ED252=29 O
- O
6BEA22?D6D2A2?6C632?5:?82?E?DEBE2?892A2 P
O
6?82?56::2?2A2C:D2C52B:2A2C:DB3=2252=29
- -
-
C69:?882 O
E?DEE=:D3=2?5EDB36B?8825:2?2 5:A6B=69
O
6. Susunan Kapasitor