3. Resistive Circuits
miércoles, 14 de diciembre de 2022 17:53
3.2 Kirchhoff’s Laws
FIGURE 3.2-3 Gustav Robert Kirchhoff (1824– – 1887). Kirchhoff stated two laws in 1847 regarding the current and voltage in an electrical circuit.
Kirchhoff’s current law (KCL): The algebraic sum of the currents into a node at any instant is zero.
Kirchhoff’s voltage law (KVL): The algebraic sum of the voltages around any loop in a
circuit is identically zero for all time.
3.3 Series Resistors and Voltage Division
Divisor de voltaje:
Resistencia en serie:
Vx = Voltaje de interés
Rx = Resistencia de interés
RT(Rs)= Resistencia total, o Resistencia equivalente en Serie
VT= Voltaje total
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3.4 Parallel Resistors and Current Division
viernes, 10 de febrero de 2023
22:52
Divisor de corriente
Resistencia equivalente en paralelo
3.5 Series Voltage Sources and Parallel Current Sources
viernes, 10 de febrero de 2023
23:01
3.10 Summary
viernes, 10 de febrero de 2023
23:09
Problems
domingo, 12 de febrero de 2023
22:11
Section 3.2 Kirchhoff’s Laws
P 3.2-3 Consider the circuit shown in Figure P 3.2-3.
P 3.2-5
Determine the power absorbed by each of the resistors in the circuit shown in Figure P 3.2-5.
Sol:
1.- Objetivos y valores conocidos :
Pr1= ?
Pr2= ?
Pr3= ?
2.- Esquema:
3.- Reduction:
4.- Laws:
Applaying KVL at mesh 2:
Applaying KVL at mesh 3:
Section 3.3 Series Resistors and Voltage Division
 
P 3.3-3 The ideal voltmeter in the circuit shown in Figure P 3.3-3 measures the voltage v.
 
 
P 3.3-5 The model of a cable and load resistor connected to a source is shown in Figure P 3.3-5. Determine the
appropriate cable resistance R so that the output voltage vo remains between 9 V and 13 V when the source voltage
vs varies between 20 V and 28 V. The cable resistance can assume integer values only in the range 20< R < 100 .
Ω
Sol:
1.- Goals and datas
9V<Vo<13V
20V<Vs<28V
20<R<100
Ω
R= ?
2.- Diagram:
3.- Reduction
4.- Laws , Rules, Theorems etc.
Voltage Divisor:
Vx = Voltaje de interés
Rx = Resistencia de interés
RT(Rs)= Resistencia total, o Resistencia equivalente en Serie
VT= Voltaje total
Section3.4 Parallel Resistors and Current Division
 
P 3.4-5 Consider the circuit shown in Figure P 3.4-5
P 3.4-7 Determine the value of the current i in the circuit shown in Figure P 3.4-7.
Section3.5 SeriesVoltageSourcesandParallel Current
Sources
1.- Goals and datas:
i=?
2.- Draw and labels:
3.- Reduce:
4.- Laws, Rules, Theorems , etc.
Current divisor
P 3.5-3 Determine the power received by each resistor in the circuit
shown in Figure P 3.5-3.
1.- Goals and information:
Pr1=? ; Pr2=?
2.- Draw and labels:
3.- Reduce:
4.- Laws, Theorems, Rules etc.
Applying KVL at mesh 2:
