183
Listrik Dinamis
94?8B
5. Rangkaian Seri dan Paralel Sumber Tegangan
414;C41070AACAC=0=A48K?00;4;AC14B460=60=B4;4187307C;C 0:0=381070A4=64=08?414300=60F0640:;8AB8:34=60=B460=60=;8AB8:
a. Perbedaan Gaya Gerak Listrik dengan Tegangan Jepit
60120030;07 .-2,1,2033,33,323 13+ 0031120213+ 0031120201 322+,0,031
120,,.2030;07 .-2,1,2033,33,13+ 0031 120213+ 0031120201 3220 ,23+,0,031120
C1C=60=0=B0066;30=B460=60=94?8B030;07 K
b. Sumber Tegangan Disusun Seri
+=BC:4=30?0B:0=AC14B460=60=F0=6;418714A0308?030B460=60= A4B80?AC14B460=60=14140?0AC14B460=60=70CA38ACAC=A4200A48
86010B40838ACAC=A4200A48A4?4B8?030.2 8:0=30 ?470B8:0=:4B86010B40838ACAC=14344B380=0:CBC1:43C010B408
F0=61434:0B0=A4;0;C14;0E0=0=B0=30 8:0 A49C;07 AC14 B460=60= 0B0C 10B408 38ACAC= A4200 A48
14;0:C
BB
K 34=60=7010B0=30;0=F0
BB
0 0 0 .
K C0B0CAF0=64=60;84;0;C80=6:080=?030.2B4
A41CB44=C78?4A000= 0 0 0
K +=BC:,1C07AC14B460=60=F0=638ACAC=A4814;0:C
, ,0
K
c. Sumber Tegangan Disusun Paralel
8:0A49C;07AC14B460=60=F0=648;8:866;A00
1 2
3
38ACAC=A4200?00;4;0:014;0:C
BB
010B0=30;0=F038CCA:0=A410608148:CB K
BB
0 0 .
K
Gambar 8.14
Rangkaian seri tiga sumber tegangan atau baterai.
R I
+ –
+ –
+ –
1 1
r
2 2
r
3 3
r
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184
Mudah dan Aktif Belajar Fisika untuk Kelas X
A B
Gambar 8.15
Tiga sumber tegangan disusun paralel.
470B8:0=.2C0B0CAF0=64=60;8?0300=6:080= 030;07
2-2
0 0 0
K
C=BC:,1C07AC14B460=60=34=60=66;
30=7010B0=30;00 F0=638ACAC=?00;4;14;0:C
,
K
8601C0710B40838ACAC=A4200A48A4?4B86010148:CB
4B80?10B40848;8:866;
,30=7010B0=30;0 8:0:4B8601C0710B408
B4A41CB387C1C=6:0=34=60=A41C077010B0= B4=BC:0=:C0B0CAF0=6
4=60;84;0;C87010B0=
7
8:4B07C8 ,
, +=BC:4=4=BC:0=:C0B0CAF0=64=60;8386C=0:0=23.9
n nr
R ,
+ 4,4
038:C0B0CAF0=64=60;8
R = 4,4 1,5 V ; 0,2
1,5 V ; 0,2 1,5 V ; 0,2
C01C0710B40838ACAC=A4200?00;4;A4?4B8?0306010148:CB
I
1
I
2
I
1 1
r
2 2
r
2
Contoh
8.11
Contoh
8.12
Empat buah hambatan masing- masing besarnya 1 ohm
dihubungkan seperti pada gambar berikut.
Hitunglah hambatan total R antara titik A dan titik B.
Tantangan
untuk Anda
R I
2 2
r
1 1
r
3 3
r
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185
Listrik Dinamis
03060100=6:080=148:CB 0 :C0B0CAF0=64=60;84;0;C8;0?C?890
1 B460=60=94?8BA4B80?10B408 4140?010B4080A8=60A8=634=60=66;
,30=
7010B0=30;0 38ACAC=?00;4;:4C380=
387C1C=6:0= 34=60= A41C07 ;0?C ?890 F0=6 7010B0==F0
8:0:C0B0CAF0=64=60;84;0;C8 ;0?C140?0:079C;0710B408F0=638ACAC=
?00;4; 470B8:0=6010148:CB
4=BC:0=00730=14A0:C0B0CA 4=BC:0=14A030=0070CA3086010148:CB
Tes Kompetensi Subbab
C
2+,--.5,5-4 470B8:0=6010148:CB
B A
12 V I
1
I
2
I
3
3 4
6
4=BC:0=14A0=F0 0 7010B0=BB0;0=B00B8B8:30=
1 2
3
4=BC:0= 0 7010B0=;8AB8:0=B00B8B8:30=
1 7010B0=;8AB8:0=B00B8B8:30= 801C0710B4080A8=60A8=634=60=66;
,30=
7010B0=30;0 38ACAC=A48:4C380=C9C=6
C9C=6=F0387C1C=6:0=34=60=A41C07;0?C?890F0=6 147010B0=
4=BC:0= 8:0A4B80?10B40848;8:866;
,30=7010B0=30;0=F0
:4C380=C9C=6 C9C=60=6:080==F0387C1C=6:0=34=60=;0?C?890F0=648;8:87010B0=
B4=BC:0= 0 :C0B0CAF0=64=60;84;0;C8;0?C?890
1 B460=60=94?8BA4B80?10B408 7
8:4B07C8 ,
,
5 A
6 A I
Q 7 A
4 A 2 A
P 3 A
A
B C
D 5
6 7
9 6
4 6
9
Kata Kunci
• rangkaian seri
• rangkaian paralel
• Hukum I Kirchhoff
• titik percabangan
• jembatan Wheatstone
• galvanometer
• gaya gerak listrik
• tegangan jepit
• hambatan dalam
9 A I
2,5 A 3,5 A
P
BB BB
,
038:C0B0CAF0=64=60;8 0?44 1
94?8B
K0
,K L
,
, 038B460=60=94?8BA4B80?10B408030;07
,
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186
Mudah dan Aktif Belajar Fisika untuk Kelas X
Gambar 8.16
Sebuah rangkaian tertutup I
R
arah loop
K
K
470B8:0=0=6:080=B4BCBC?A4?4B86010148:CB
I I
A B
D C
R
4
= 6 R
3
= 5 R
2
= 6 R
5
= 3 R
1
= 6
1 1
36 V 2
r
2 2
16 V 0,5
r
4 4
12 V 0,7
r
3 3
20 V 0,8
r
8BC=6;07 0 :C0B0CAF0=64=60;8?0300=6:080=
1
7
0 4=CCBC:C8277553830;00=6:080=B4BCBC?B4A41CB14;0:C 8A0;:0=007;?A400734=60=?CB00=90C90A478=660?4A000=B4A41CB
4=9038 K
1
K
2
K
3 4
KK
K
D. Hukum II Kirchhoff
33+0-0B0C38A41CB9C60230,--.3830A0:0=?030C:C 4:4:0;0==468=468?030AC0BC0=6:080=B4BCBC?030;07:4:0;
33+0-4=F0B0:0=107E03+ 0.03 ,2,, 6,+,,13230,,202323.--.1+,,,-4200
0B40B8A38BC;8AA410608148:CB
470B8:0=.2
0F0640:;8AB8:
308AC14B460=60= 4=F4101:0=0CA;8AB8:4=60;8A4?0=90=6;?CA;8AB8:3830;0
;?4=30?0B7010B0=A478=6604=60;08?4=CC=0=B460=60=2 3.9 30?0B38BC;8AA410608148:CB
1. Rangkaian dengan Satu Loop
.24=C=9C::0=0=6:080=A43470=034=60=A0BC;?030 0=6:080=B4A41CB0CA;8AB8:F0=64=60;8030;07A00F08BC8A0;:0=
=304=6018;007;?A400734=60=007F08BC7 7774;0= 9CB=F0:C0B0CA30?0B3878BC=634=60=C:C827755148:CB
0:0?030.214;0:C K
0 0
Gambar 8.17
Rangkaian dengan satu loop R
arah loop I
b c
a d
I
Contoh
8.13
2 1
2 2
r
1 1
r
0=6:080=B4A41CB0CA;8AB8:F0=64=60;8030;07A00F08BC
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