What is Kirchoff's loop: Definition and 19 Discussions
Kirchhoff's circuit laws are two equalities that deal with the current and potential difference (commonly known as voltage) in the lumped element model of electrical circuits. They were first described in 1845 by German physicist Gustav Kirchhoff. This generalized the work of Georg Ohm and preceded the work of James Clerk Maxwell. Widely used in electrical engineering, they are also called Kirchhoff's rules or simply Kirchhoff's laws. These laws can be applied in time and frequency domains and form the basis for network analysis.
Both of Kirchhoff's laws can be understood as corollaries of Maxwell's equations in the low-frequency limit. They are accurate for DC circuits, and for AC circuits at frequencies where the wavelengths of electromagnetic radiation are very large compared to the circuits.
Does anyone know how to do part (a). I labelled the current through R1 I1, I4 through R4, I3 through R3, I2 through R2, and I5 through the 3ohm resistor.
I used Kirchoff’s Laws to make the equations I1 + I4 = 8, 2I1 + 32I3 - 14I4 = 30, and I1 + I3 - I4 = 0.
I solved these equations by subbing...
Homework Statement
Homework Equations
Kirchoff's Rule
The sum of all V = 0
The Attempt at a Solution
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I think I'm having a problem determining the current at r_2 and R_3. I had originally thought the currents at both resistors would be I_3, writing E_2 — r_2 I_3 — R_3 I_3 — I_1 R_1 = 0...
Homework Statement
Res-monster maze. In Fig. 27-21, all the resistors have a resistance of 4.0 and all the (ideal) batteries have an emf of 4.0 V. What is the current through resistor R? (If you can find the proper loop through this maze, you can answer the question with a few seconds of mental...
Homework Statement
Find currents I1 and I2 in the following circuit:
Homework Equations
I know I have to use Kirchoff's loop rule but I am not sure of the current going through the 5 ohm and 8 ohm resistors, is it just I1 and I2 respectively? Also do I incorporate the large loop at the...
A 5μF capacitor is connected in parallel with a 2MΩ resistor and the combination is then connected in series with a 1MΩ resistor through a switch to a 12V battery. Find the time taken for the voltage across the capacitor to rise from zero initial value to 2V after the switch is closed.From what...
Homework Statement
The circuit to the right consists of a battery (V0 = 26.0 V) and five resistors (R1 = 211 Ω, R2 = 682 Ω, R3 = 363 Ω, R4 = 534 Ω, and R5 = 465 Ω). Find the current passing through each of the specified points. The Circuit http://i.imgur.com/4JSIHdG.png all I need to find is Ih...
Here is a portion of the explanation my book gives
"Kirchoff's second rule follows the law of conservation of energy. Let's imagine moving a charge around a closed loop of a circuit. When the charge returns to the starting point, the charge-circuit system must have the same total energy as it...
Homework Statement
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Consider the circuit above. You are given the following measured values:
V = 1.5 V
R1 = 100
R2 = 100
R3 = 50
R4 = 50
R5 = 50
Homework Equations
Kirchhoff's Loop Rule and Junction Rule
The Attempt at a Solution
I tried setting this up using the junction and loop...
Homework Statement
Find the currents going through each resistor.
Homework Equations
V=IR
The Attempt at a Solution
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I have the problem worked out and I can't find any errors in my work. The issue is that my professor has:
I1=-.0843
I2=.086
I3=.0017
However my physics professor is...
Hi
Let's look at this:
The issue I am having is that while I know that this is accurate:
I just cannot wrap my head around why. I1 is a result of both voltage sources. So, while the equations clearly tell me that the voltage drop across the resistor R1 is I1R1, I cannot wrap my...
"Use Kirchhoff’s rules to calculate the current through each ideal battery in the figure
below. R1=1Ω, R2=2Ω, ε1=2V, ε2=ε3=4V. You should apply Kirchoff’s loop rule to the ε1-R1-R2-ε2-R1 loop, and the ε2-R2-R1-ε3-R1 loops respectively, each time starting from the negative end of the battery...
Homework Statement
Compute the current through R2 of the circuit in the figure.
Homework Equations
kirchoff's loop rule
V=IRThe Attempt at a Solution
Junction: I1+I2=I3
Alpha loop: V1-I3R3-I5R5=0
I1=(V1-I5R5)/R3=?
Beta loop: V2-I8R8-I5R5=0
*without one of the currents provided I am not...
Kirchoff's Loop Rule--Direction of Current?
I came across this question, and it really confused me-- how does the current decide which direction it goes?
The pictures are attatched below.
The first picture is of the original questions. It gives two scenarios, and asks you what the value...
http://www.screencast.com/users/trinhn812/folders/Jing/media/de5edaba-e848-47f5-82b9-bd770b216e95
I need help with Question 27 specifically. The correct answer is A, but I don't understand why.
I thought it would be B according to Korkoff's Loop rule of the inner left loop, where current...
Homework Statement
How does the loop rule apply to capacitors? I can't find any examples of circuits containing capacitors and resistors where the loop rule is used. I know the loop rule measures potential differences, but I'm not quite sure if that has anything to do with capacitors? All...
The problem:
I have one loop of a larger circuit. It has a DC power supply set to 5 V, a 220 Ohm resistor, a junction, a 100 Ohm resistor, a junction, a 470 Ohm resistor, a junction, then it goes back to the power supply.
The current through the 220 Ohm resistor is 11.71 mA (0.01171 A)...
I was wondering why Kirchoff's loop rule holds for the complex representations of voltage drops in AC circuits. That is, sum of complex voltage drops = 0.
I tried working it out from Kirchoff's rule in DC, but am not sure how to proceed properly.
I have a diagram on my website and I also attached it to this message. My question is I am wondering if my equation for this loop rule is correct. I am trying to solve it but I am having a problem about the signs I am getting..
This is my equation for this loop:
I_2=I_1+I_3...
I'm having some trouble understanding Kirchoff's loop law. I understand that it is a statement of conservation of energy, and I understand this. My problem comes when we start talking about circuit elements. If we had a shorted battery, the electrons moving through the circuit would loss...