What is Circuit analysis: Definition and 566 Discussions

A network, in the context of electrical engineering and electronics, is a collection of interconnected components. Network analysis is the process of finding the voltages across, and the currents through, all network components. There are many techniques for calculating these values. However, for the most part, the techniques assume linear components.
Except where stated, the methods described in this article are applicable only to linear network analysis.

View More On Wikipedia.org
Recent contents Top users
  1. D

    Is This Diode Circuit Analysis Correct?

    Hello everyone. Can you tell me if i solve right this circuit? D2 is on off mode so I2 is approximately 0,D1 is the same and D3 is on ON mode so the equivalent circuit is like AFTER. Is it ok what i did? http://postimage.org/image/mblq1dr7n/
  2. P

    Engineering AC Circuit Analysis (Nodal RMS)

    Homework Statement The question is: The given answer is: Homework Equations The Attempt at a Solution I already got the "correct" answers. My question is, I used Vrms voltage and Irms current to solve the nodal analysis. Would it be incorrect to use Vpeak and Ipeam to solve the circuit...
  3. C

    Help Needed: Solve Circuit Analysis Problem

    Hello dear Physics Forums community, I need your help! I m an electrical engineering student in second class, and I m stuck with a different kind of problem (probably different to me only, lawl) in the Circuit Analysis. I believe this problem will be a stepping stone for the other problems I...
  4. Q

    Engineering LC circuit analysis problems with 2 voltage sources

    Homework Statement . In the following transient circuit, assume at t<0, the circuit is at steady state. Find v0(t) for t>0 http://sphotos-b.xx.fbcdn.net/hphotos-ash3/c0.0.354.354/p403x403/546839_509413575744829_42997155_n.jpg Homework Equations The Attempt at a Solution The...
  5. P

    Engineering Superposition - Circuit Analysis

    Homework Statement Is the answer to the following circuit: 600 mA? I seem to be getting 660 mA for some reason...
  6. G

    Engineering Solving Circuit Analysis Problems: Tips for Finding Current and Voltage Values

    Hi there, I have difficulties with the last 2 parts of the question - b) and c) The Attempt at a Solution I think I found the right values for I1, I2 , I3 I1 = 1A I2 = I3 = 0.5A Voltage drops V1 - V4 using E=I * R (16,16,8,8,16,8) Powers - 16,4,8,4,8,8 Regards
  7. I

    Engineering Circuit Analysis of driven RC Circuit with short circuits

    Homework Statement Determine the value of the current labeled i and the voltage labeled v at t=0+, t= 1.5 ms, and t = 3.0 ms. Homework Equations Ohm's law: v = i *r Decay in source free RC Circuit v(t) = v@0 * e^(-t/RC) The Attempt at a Solution i(0-) = 0.1 A. Therefore, v across 200 ohm =...
  8. S

    Engineering Circuit Analysis of a Positive Offset Clamping Diode Circuit

    Homework Statement Plot the waveforms for capacitor voltage VC, output voltage Vo, and diode voltage Vd given that Vs is a 20 Vpp triangle wave with period T. Use CVD model with diode VON = 0.7 V. Homework Equations KVLs? The Attempt at a Solution From my basic...
  9. P

    Engineering How to Correctly Solve a Circuit Analysis Homework Problem?

    Homework Statement http://puu.sh/1faG5 Homework Equations The Attempt at a Solution http://puu.sh/1faFD I labelled the nodes ^^. I redrew the circuit based on the nodes, I ignored the 10 ohm resistor because it short circuits. (Note: I drew the series resistors in reverse order, 80 ohms...
  10. P

    Engineering How Do You Calculate the Voltage Across v1 Using KCL and KVL?

    Homework Statement Find the voltage across v1 in the circuit below: http://puu.sh/1eD2R Homework Equations The Attempt at a Solution I tried using KVL across loop 1 (from left) and then: LOOP2: v1, 2ohms,1ohm,4V LOOP3: also: 5V, 2ohms, 1ohm, 4V I seem to be getting 3V as the voltage across...
  11. P

    Engineering Circuit Analysis: Solving for Req of 10 Ohms

    Homework Statement Image: http://puu.sh/1ejYb Homework Equations Req of n resistors in series = R1 + R2 + ... + Rn Req of n resistors in parallel = 1/R1 + 1/R2 + ... + 1/Rn The Attempt at a Solution The answer is supposed to be 10 ohms. However, I don't know how they got...
  12. Q

    Engineering How Do You Calculate Voltages and Power in a Complex Circuit?

    Homework Statement (a) Find v1 and v2 in the following circuit. ( i assume that they are asking for voltage of 30Ω and 5Ω) (b) Determine the power dissipated in the 6-Ω resistor. https://sphotos-b.xx.fbcdn.net/hphotos-ash3/580277_498142810205239_1717053686_n.jpg Homework Equations Equivalent...
  13. ElijahRockers

    Engineering Circuit Analysis KCL question

    Homework Statement if V_g = 54V find i_0, i_1, i_2 The Attempt at a Solution In the left most closed loop, Since the source voltage is 54, I assumed there must be a voltage drop across the 12Ω and 6Ω resistors equal to 54. This makes VΔ 18V. Next I tried to KCL the node below it, but it...
  14. ElijahRockers

    Engineering Circuit Analysis: Find R & Power from i_o, v_g

    Homework Statement The current i_o = 8A, Voltage v_g = 480 V. a) Find the value of R. b) Find the power supplied by the voltage source. The Attempt at a Solution Well, I noted both pairs of series resistors, to make the calculations a little simpler, and what I ended up with...
  15. B

    Find Power & PF of Loads & Source: Circuit Analysis HW

    Homework Statement Please view PDF for schematic of circuit and more information on loads. Load 1 is the 5 KVA load and Load 2 is the 10 KVA load. Loads 1 and 2 are operating at their rated voltages of 220 V rms. a) Find Load 1’s real and reactive power b) Find Load 2’s real and reactive...
  16. M

    Engineering Circuit Analysis with VCCS and VCVS

    Homework Statement For the circuit in Figure P1.42, suppose R3 = 2*R2, and R2 = 10 * R1. Find the resistor values so that Gv = Vout/Vin = 1000. Homework Equations V = IR for Voltage Controlled Current Source - i(t) = gm * vx for Voltage Controlled Voltage Source - v(t) = μ * vx...
  17. W

    Engineering Finding V1 and V2 in a Circuit Analysis for Scientists

    Please take a look at the question and help me find the v1 and v2. thank you!
  18. D

    [Circuit Analysis] Hard Time to Decide

    What textbook do experts here recommend for a first course in DC/AC circuit analysis? I've checked what many universities use in EE, and reviewed some of these texts. However I see they almost have the same outline of topics but they differ slightly in how they approach each topic. Some...
  19. E

    Engineering DC Circuit Analysis & Thevenin Problem

    Homework Statement Need to establish a Thevenin equivalent for the circuit attached. Homework Equations None given. Need to use Kirchhoff. The Attempt at a Solution I worked out the following: I said that R3 and R4 are in series as there is no current splitting because 0A...
  20. R

    Solving for Forces in a Uniform Field: A Circuit Analysis

    Homework Statement the current is i, the circuit is in a uniform magnetic field B normal to the plane of the circuit as indicated Attached is the circuit Homework Equations Get the forces acting on each of their sides. Direction and data module for the following: L = 10cm R = 10cm I =...
  21. S

    [Paper choice] Numerical Mathematics or Analog Electronics and Circuit Analysis.

    I am a physics major and have to make a choice between either of these two papers. The numerical mathematics is at the equivalent to US senior level and the electronics paper is equivalent to US junior level. I'm quite interested in biophysics and/or medical physics for grad school but I'm not...
  22. F

    Engineering State Variable Method (Circuit Analysis)

    Homework Statement http://img12.imageshack.us/img12/1176/img20120713190506.jpg Homework Equations V_{C}' = dv/dt I_{L}' = di/dt The Attempt at a Solution I did KCL at the centre node: I_{L} + i_{2} = \frac{V_{C}'}{5} (Vc'/5 is basically the current coming from the capacitor...
  23. S

    How do IC chips affect circuit analysis?

    How do you analyze things like Resistance, Impedance, Current, and Resistance for a circuit that uses ICs? Are there factors I have to account for in the IC itself?
  24. T

    Engineering Circuit Analysis: Current flowing from negative to positive?

    Homework Statement http://images.4chan.org/sci/src/1340320682704.jpg I am to write KCL equations for this circuit. Why is it that the current flowing AWAY from Node C is written as V2(t). I thought that when a current was flowing AWAY from a node, the current would be -V2(t)...
  25. W

    My class schedule, question about Circuit Analysis

    Calculus 3 Physics 2 US History and the World Circuit Analysis I seen my friends struggle in Calculus 3, only to realize it was because of a poor foundation in the previous Calcs. They said Physics 2 was harder than 1 but more enjoyable in the lab. The history class is what i expect from...
  26. A

    Solving 2 Questions on Circuit Analysis: PD Across 3 Ohm & EMF of Batteries

    Homework Statement I have two questions. Both questions are in the picture below. Dont mind my workings lol http://img163.imageshack.us/img163/5680/scanpic0001qe.jpg Ans to the 1st qn: C The potential difference across the 3ohm resistor is zero. Thus, it can be considered that the 4ohm and...
  27. C

    Engineering Circuit Analysis for Power Transmission Network Question

    Hey! Below you will find a piece of text I found on a paper. There are some things I don't get, perhaps you could help me. What it means for the network to be lossless? Also, why is the power flow equal to Re[Vi(t) Ii,k(t)*] and not outright Vi(t)*Ii,k(t) ? Why the complex conjugate? I...
  28. E

    Simple Circuit analysis of potentiometer problem

    Really simple problem but: If you have a circuit with a power supply, a potentiometer and an output voltage taken from midway down the potentiometer and just after it; would this act like a potential divider with the potentiometer acting as two resistors?
  29. N

    Engineering Circuit Analysis - Simple supernoide question

    Homework Statement Can a supernode have a resistor or any other element in it? The Attempt at a Solution I'm guessing it can because all voltage sources have internal resistance of some sort, and this can be represented by a resistor in series with a voltage source between two unknown...
  30. D

    Engineering Solve Circuit Analysis Homework: Find v1, v2, v3 with Nodal Analysis

    Homework Statement Find v1, v2, v3 Must be done with nodal analysis Homework Equations I=V/R The Attempt at a Solution So i started by saying i1 = v2/4, i = v1/2, i3 = v3/3 i + i1 + i2 = 0 v3-v2=51 v1-v2=0 I am not really sure to what to do from here, i can't seem to come...
  31. J

    Engineering Complex Circuit Analysis Simplification

    I have the following circuit... I have managed to derive an equation for U2: Now I want to substitute U2 into U1, in order to derive equation for U1 I have defined U1 as: Now I substitute U2 into the above equation. This is how far I get...I am stuck... My circuit...
  32. D

    AC Circuit Analysis: LCR & Resonance

    Hi, I am currently struggling with this AC question that is required for my first year electrical engineering coursework. I know sort of how to go about it all, but am having a really difficult time implementing the correct calculations. Any help would be appreciated! Context You are given a...
  33. B

    Engineering NPN Transistor Circuit Analysis

    Homework Statement Determine the voltage level at V3. For each case also determine which transistors are on and saturated, on and active, and which are off. Let R1=R2=R3=2.2kΩ and let Rc=240Ω and Vcc=5V. Calculate β for each transistor as well. We are to assume that if the transistor is on...
  34. M

    Analyzing Electric Circuits: Homework Help

    Homework Statement [attachment] Homework Equations I=V/R V=R*I R=V/I Rseries = R1 + R2 + R3 ... 1/Rparallel = 1/R1 + 1/R2 + 1/R3 ... Kirchhoff Law The Attempt at a Solution Rsource = Vsource/Isource Rsource = 50/0.25 Rsource = 200Ω I don't know what to do next!
  35. P

    Laplace Transforms and Phasors in Circuit Analysis

    So last semester, I had a Circuit Analysis course where I learned about phasors. Basically, when dealing with AC circuits, I should convert everything to the frequency domain where X = j\omega L and X = \frac{1}{j\omega C}. I feel like I understood this part really well. However, in Circuits...
  36. S

    Engineering Basic Circuit Analysis - Transfer Function with Nodal Analysis

    Hi guys, I have a winter break homework assignment for my EE college course. I've been given what seems to be a simple circuit analysis problem, but feel that I am making it much harder on my self by using nodal analysis. I have to find the transfer function of the circuit. My work has been...
  37. Y

    Circuit Analysis current and induction

    Homework Statement The Attempt at a Solution I'm not really sure where to start with this one. I know that in steady state the capacitor will become an open circuit and the inductor a short circuit. I first changed the current source to a thevenin equivalent of 1.2mV. I don't...
  38. O

    Why is the Author Using Negative Signs in this Circuit Analysis Problem?

    why the author is using negative sign there? And here the problem is different the author is using different current flow signs and one answer is positive and other is negative why is this so? See this? http://i42.tinypic.com/2rqdj5w.jpg
  39. S

    Engineering Circuit analysis (with transformers and motor)

    Homework Statement Consider the motor arrangement shown, Assume ideal transformers and lossless transmission lines. The start capacitor shown in series with the motor is only used to start the motor, and is then shorted out of the circuit. The motor is loaded such that it delivers 5hp, and...
  40. T

    Engineering Circuit Analysis - Source Transformation

    Homework Statement Find Vx using source transformation Homework Equations V=IR KVL The Attempt at a Solution After doing source transformation on the three pairs of current sources and resistors... KVL: -6+2I-Vx+4I-3+3I+5I-2=0 14I-Vx-11=0 but Vx=5I (is it? I'm not so sure about this)...
  41. W

    Multi-loop time-invariant circuit analysis

    This is the type of problem I've been told to expect for my circuits exam tomorrow, so if anyone can provide some guidance or criticism I would greatly appreciate it. Homework Statement Given the circuit pictured below, find: I. The size and direction of the current at C. II. The...
  42. T

    Can someone please recommend me basic circuit analysis video lectures?

    *Sorry about my bad english, I'm not a native english speaker.* To make a long story short, my university uses this book: http://www.amazon.com/dp/0132130068/?tag=pfamazon01-20 Unfortunately this class isn't teached using a normal approach, and we are supposed to learn everything by...
  43. S

    Circuit analysis techniques questions

    I just want to know if there are ever any circuits where I am required to use voltage division, or current division, source transformation, etc will i ever be required to use them, or can i get by using node voltage and mesh current analysis? i'm asking because i have a midterm coming up...
  44. D

    Engineering Circuit Analysis Involving Inductance

    Homework Statement The Attempt at a Solution Just was hoping someone here would be able to help me with the circuit above. I wanted to ensure that I analyzed it properly. I applied Ohm's Law to determine the initial current through the inductor. i(initial)=-16V/2.2kΩ=-7.27 mA...
  45. N

    POLL: The BEST Circuit Analysis Textbook & Circuit Analysis Help

    I am looking for recommendations on the which textbook/resource (though I prefer textbook) provides the greatest understanding and development of intuition in utilizing circuit analysis to solve problems. Background: I have the book: "Fundamentals of Electric Circuits" by Sadiku &...
  46. pairofstrings

    Different methods of circuit analysis

    Hybrid equivalent model Graphical determination Is there more to this list? I am studying the book on Electronic circuit analysis by Godse. Is the following part of circuit analysis methods? Nodal Analysis Mesh current analysis Superposition Impulse response Convolution How to...
  47. N

    Engineering Circuit Analysis Help - Find Out Diode State & V0

    [a]1. Homework Statement [/b] I have the following circuit attached as PDF and I need to find out if the state of the diode and what V0 is. The forward voltage on the diode is 1V. [a]3. The Attempt at a Solution [/b] I just simply used current division to know that the diode is on since...
  48. G

    Circuit Analysis : Using Kirchoffs

    Homework Statement http://img202.imageshack.us/img202/939/95788682.jpg Find Vo Vo = -50V (given answer by my prof) Homework Equations KVL (Series) V=V1+V2 (Parallel) V=V1=V2 KCL Current toward the node = Current Away from the node V=IR The Attempt at a Solution i tried to solve for the i in...
  49. B

    Would someone kindy give me some tips for Circuit analysis?

    I know that mesh method can only be used in loops without inside loops. Kirchhoff's laws for few unknowns. And nodal analysis can be used for analyzing almost all circuits, right? But what to use for an easier solution? I know that it is dependent to what is given but I just want to have an...
  50. D

    Recomendations for Introductory Circuit Analysis Textbooks

    As the title states, I am looking for recomendations, and explanations as to why it was a good book. Some current suggestions I have had is by Robert L. Boylestad. Thanks in advance!
Back
Top