3. a.) Diket :
R1= 60Ω I= 4mA
R2= 1,2K Ω R3= 2,74KΩ
Ditanya : E =
…?
Jawab : RT
= R1+R2+R3
= 60Ω+1,2K Ω+2,74KΩ
= 4000Ω
E = I.R
= 0,004A.4KΩ = 16 V
b.) Diket : R1=
1,2 Ω I= 250mA =
0,250A
R2=
8,2 Ω R3= 4,7 Ω R4= 2,7 Ω
Ditanya : E=…?
Jawab
: RT =
R1+R2+R3+R4
= 1,2 Ω+8,2 Ω+4,7 Ω+2,7 Ω
= 16,8 Ω
E
= I.R= 0,250A.16,8 Ω = 4,2 V
4. a.) Diket : R1=
5 Ω RT =
16 Ω
R2 = 2 Ω VR2 = 12 V
Ditanya : a.)
R3 = …?
b.) IR2
= ...? c.) E = ...?
Jawab
: a.) R3 = RT –(R1+R2)
=
16 Ω -(5 Ω+2 Ω)
=
16 Ω - 7 Ω
= 9 Ω
b.) IR2 = V
R2
= 12 V
2 Ω
= 6 A
c.) E = VR1+VR2 +VR3 VR1 =
I.R1
=
30V+12V+54V = 6A.5Ω
= 96V = 30 V
VR3 =
I.R2
= 6A.9 Ω
= 54 V
b.)
Diket : R1= 3,3K Ω VR2 =
9V
R3=
2,2K Ω PR3 = 79,2 mW
Ditanya :
a.) I R3
= …?
b.) R2= …?
C.) E= …?
Jawab : a.) PR3 = I2.R 
IR3 =
PR3
R3
=
79,2 mW
2,2K Ω
=
36mA
= 6 mA
b.) R2 = VR2
IR2
= 9
V = 1500 Ω
0,006A
c.) E = VR1+VR2 +VR3 VR1 =
I.R1
= 19,8V+9V+13,2V =
0,006A.3,3K Ω
= 42 V = 19,8 V
PR3 =
VR3.I
VR3 =
PR3
I
VR3= 79,2mW
0,006A
= 13,2 V
5.
a.) Diket : E1 = 8V R1 =
4,7 Ω
E2 = 16V R2 = 5,6 Ω E3 = 4V
Ditanya : I
=…?
Jawab : RT = R1+R2
= 4,7 Ω+5,6Ω = 10,3 Ω
I = ET ET =
+16V-8V-4V
RT = 4V
= 4V = 0,388A
10,3 Ω
b.) Diket : E1= 4V R1=
4,7 Ω
E2=
18V R2=1,2 Ω
E3=
10V R3= 5,6 Ω
Ditanya : I =
…?
Jawab
: RT = R1+R2 +R3 ET =
+E2+E3-E1
= 4,7 Ω+1,2 Ω+5,6 Ω
=18V+10V-4V
= 11,5 Ω =24V
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