Series Circuit
Chapter 4
Chapter 4
Electric Circuits Fundamentals - Floyd
© Copyright 2007 Prentice-Hall
Chapter 4
Series circuits
Summary
All circuits have three common attributes. These are: 1. A source of voltage. 2. A load. 3. A complete path.
VS + R3 R1 R2
Electric Circuits Fundamentals - Floyd
© Copyright 2007 Prentice-Hall
Chapter 4
Series circuits
Summary
A series circuit is one that has only one current path.
R1
R1 R2 R3
VS R3
R2
VS
R1
R2
R3
VS
Electric Circuits Fundamentals - Floyd
© Copyright 2007 Prentice-Hall
Chapter 4
Summary
Series circuit rule for current:
Because there is only one path, the current everywhere is the same. For example, the reading on the first ammeter is 2.0 mA, What do the other meters read?
+ 2.0 mA _ VS _ R1 + 2.0 mA _ R2
2.0 mA +
_
2.0 mA +
© Copyright 2007 Prentice-Hall
Electric Circuits Fundamentals - Floyd
Chapter 4
Series circuits
Summary
The total resistance of resistors in series is the sum of the individual resistors. For example, the resistors in a series circuit are 680 Ω, 1.5 kΩ, and 2.2 kΩ. What is the total resistance?
R1 VS 12 V
680 Ω
R2 1.5 kΩ
4.38 kΩ
R3
2.2 kΩ
Electric Circuits Fundamentals - Floyd
© Copyright 2007 Prentice-Hall
Chapter 4
Series circuit
Summary
VS 12 V
R1
680 Ω
R2 1.5 kΩ
R3
2.2 kΩ
Tabulating current, resistance, voltage and power is a useful way to summarize parameters in a series circuit. Continuing with the previous example, complete the parameters listed in the Table. I1= 2.74 mA I2= 2.74 mA I3= 2.74 mA IT= 2.74 mA R1= 0.68 kΩ R2= 1.50 kΩ R3= 2.20 kΩ RT= 4.38 kΩ V1= 1.86 V V2= 4.11 V V3= 6.03 V VS= 12 V P1= 5.1 mW P2= 11.3 mW P3= 16.5 mW PT= 32.9 mW
© Copyright 2007 Prentice-Hall
Electric Circuits Fundamentals - Floyd
Chapter 4
Summary
Kirchhoff’s voltage law Kirchhoff’s voltage law (KVL) is generally stated as: The sum of all the voltage
Chapter 4
Electric Circuits Fundamentals - Floyd
© Copyright 2007 Prentice-Hall
Chapter 4
Series circuits
Summary
All circuits have three common attributes. These are: 1. A source of voltage. 2. A load. 3. A complete path.
VS + R3 R1 R2
Electric Circuits Fundamentals - Floyd
© Copyright 2007 Prentice-Hall
Chapter 4
Series circuits
Summary
A series circuit is one that has only one current path.
R1
R1 R2 R3
VS R3
R2
VS
R1
R2
R3
VS
Electric Circuits Fundamentals - Floyd
© Copyright 2007 Prentice-Hall
Chapter 4
Summary
Series circuit rule for current:
Because there is only one path, the current everywhere is the same. For example, the reading on the first ammeter is 2.0 mA, What do the other meters read?
+ 2.0 mA _ VS _ R1 + 2.0 mA _ R2
2.0 mA +
_
2.0 mA +
© Copyright 2007 Prentice-Hall
Electric Circuits Fundamentals - Floyd
Chapter 4
Series circuits
Summary
The total resistance of resistors in series is the sum of the individual resistors. For example, the resistors in a series circuit are 680 Ω, 1.5 kΩ, and 2.2 kΩ. What is the total resistance?
R1 VS 12 V
680 Ω
R2 1.5 kΩ
4.38 kΩ
R3
2.2 kΩ
Electric Circuits Fundamentals - Floyd
© Copyright 2007 Prentice-Hall
Chapter 4
Series circuit
Summary
VS 12 V
R1
680 Ω
R2 1.5 kΩ
R3
2.2 kΩ
Tabulating current, resistance, voltage and power is a useful way to summarize parameters in a series circuit. Continuing with the previous example, complete the parameters listed in the Table. I1= 2.74 mA I2= 2.74 mA I3= 2.74 mA IT= 2.74 mA R1= 0.68 kΩ R2= 1.50 kΩ R3= 2.20 kΩ RT= 4.38 kΩ V1= 1.86 V V2= 4.11 V V3= 6.03 V VS= 12 V P1= 5.1 mW P2= 11.3 mW P3= 16.5 mW PT= 32.9 mW
© Copyright 2007 Prentice-Hall
Electric Circuits Fundamentals - Floyd
Chapter 4
Summary
Kirchhoff’s voltage law Kirchhoff’s voltage law (KVL) is generally stated as: The sum of all the voltage