What is Circuits: Definition and 1000 Discussions

Formula One, abbreviated to F1, is currently the highest class of open-wheeled auto racing defined by the Fédération Internationale de l'Automobile (FIA), motorsport's world governing body. The "formula" in the name refers to a set of rules to which all participants and vehicles must conform. The F1 World Championship season consists of a series of races, known as Grands Prix, usually held on purpose-built circuits, and in a few cases on closed city streets. The results of each race are combined to determine two annual championships, one for drivers (World Drivers' Championship), and one for constructors (World Constructors' Championship).This list is for the circuits that hosted World Championship races from 1950 until now. The terms "Formula One race" and "World Championship race" were not always synonymous throughout history – see Formula One#Distinction between Formula One and World Championship races for a detailed explanation.

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  1. M

    Circuits (Nodal and loop anal. finding current through branch)

    I am trying to solve for isc. The correct answer is isc = 6mA but I got 0 mA. My equations must be correct... If they are not please someone explain why. Thank you.
  2. T

    Electrical Circuits - Linear Algebra

    Homework Statement Here is a picture of the diagram. http://gyazo.com/f1b7051fda5b9e1d3a185c53abde1211 I must use the Gauss Jordan elimination method and solve for X1, X2 and X3 I am having problems setting up my equations Homework Equations The Attempt at a Solution...
  3. A

    Engineering [Circuits] Calculating the Norton Equivalent

    Homework Statement Homework Equations The Attempt at a Solution I am trying to compute ##I_N##. I connected nodes a and b. The circuit after some simplification: $$\frac { 180-{ V }_{ 1 } }{ 20 } =\frac { 120-V_{ 1 } }{ 40 } \\ { V }_{ 1 }=240\quad V\\ \\ R=\frac { V...
  4. A

    Engineering [Circuits] Computing the Thevenin Equivalent #2

    Homework Statement Homework Equations The Attempt at a Solution I am trying to find the equivalent resistance for part b. First, we turn off independent sources. We open circuit the 2A source and we close circuit the 30V source. We're left with two resistors. Are they in series or parallel...
  5. A

    Engineering [Circuits] Calculating the Thevenin Equivalent #1

    Homework Statement Homework Equations The Attempt at a Solution I got ##R_{ th }=4\quad Ω## easily but I am having trouble finding ##V_{th}##. Assume the negative terminal of the 32V voltage source is ground. Here is the nodal analysis at node 1: $$\frac { 32-V_{ 1 } }{ 4 } +2=\frac { V_{...
  6. A

    Engineering [Circuits] Calculating voltage and current in a circuit

    Homework Statement Homework Equations The Attempt at a Solution How does the author do the below? $$v_{ i }=2li=42V$$ What equation is he/she using?
  7. A

    Engineering [Circuits] Solving a KCL Problem

    Homework Statement Homework Equations The Attempt at a Solution Here is what I don't understand: how can this circuit exist? If you look at the V2 node, there are 3 currents going in but none going out. Isn't this a contradiction? From what I've heard, you can arbitrarily...
  8. A

    Engineering [Circuits] Calculating the power absorbed by a resistor

    Homework Statement Homework Equations The Attempt at a Solution Attached to this post. I have calculated the power absorbed for the 6S and 5S resistors but not the 3S resistor.
  9. G

    Engineering Control Systems Engineering - Circuits

    Homework Statement Find the transfer function, G(s) = \frac{V_{0}(s)}{V_{i}(s)} for each network shown in figure P2.3. [Section 2.4] http://imagizer.imageshack.us/v2/800x600q90/20/1ocq.png Homework Equations The Attempt at a Solution When I try and solve this problem I...
  10. L

    RC Circuits, capacitor charges and voltages

    These are 2 stand alone problems, however the answers disagree with one another and I am trying to reconcile their differences. Any insight would be appreciated! :) The answer is C. The answer provided with this question is that "there is no dependence on resistance of any kind". However the...
  11. F

    Understanding Series Circuits: Exploring the Flow of Charges

    Hello all, A quick question: I am trying to come up with a valid explanation of a question posed to me regarding series circuits. It was deceptively simple but unsure how to address it. I would very much like any thoughts on this: how do the charges 'know' to give only some of their energy...
  12. M

    Circuit Question - Combining/Redrawing Circuits

    Circuit Question -- Combining/Redrawing Circuits I don't understand how they the circuit on the left was redrawn to be the circuit on the right. 1. How did they know R1 and E1 were parallel to R2 and E2 and the 6 ohm resistor? 2. How did they know that E1 should be position as it is in...
  13. M

    Engineering Counter and comparator circuits connected

    Hi all, I need serious help here. I have to build two types of circuits as shown in the attached. The second one shows the circuit when the comparator's output is returned to the CLP. The IC's used here are IC 85 and IC 393 and the prototyping board used here is NI ELVIS 2. I think I have...
  14. M

    Engineering Finding Vy in a Circuit with Dependent Sources

    Homework Statement Determine Vy in the circuit of the below figure: (In attachment) Homework Equations ohms law resistance adding equations for parallel and series The Attempt at a Solution So I found Vx=(1.2A)(5ohms) = 6v Afterwards I computed the current supplier: (6)(0.1)=0.6...
  15. paulmdrdo1

    MHB Electronics Engineering: Determine Voltage in Circuit w/ Practical Model

    Determine the voltage with respect to the ground at each point in figure. Assume the practical model. guys please help me solve this circuit. anybody in electronics engineering help.
  16. P

    How to Excel in Thermodynamics and Circuits?

    I'm kind of struggling in my thermodynamics and circuits courses. I was wondering if anyone knew any great websites that teach and explain the stuff well
  17. C

    Can a Voltmeter Measure the Voltage Drop Across Resistors in a Parallel Circuit?

    Problem statement What would the voltmeter on the parallel circurt read? In the diagram. Revelant equations : V=IR Attempt at solution: Just wanted to confirm a fact : the 10 V given in the circurt drawing would be the drop in potential meaning that it lost 10 V so the potential energy...
  18. B

    What is the voltage drop across the resistor in a discharging RC circuit?

    Homework Statement Determine the voltage drop across the resistor when the capacitor has been discharging for 10μs. Capacitance=400 pico farad and is charged to 10v through a 50kΩ resistor. Homework Equations Vr= V*e -t/CR The Attempt at a Solution Vr = V-Vc at the instant of 10μs...
  19. B

    How Does Current Behave in a Discharging RC Circuit?

    Homework Statement Determine the current flowing when the capacitor has been discharging for 5μs Capacitance=400 pico farads which is charged to 10v through a 50kΩ resistor. Homework Equations Vc = ve-t/CR The Attempt at a Solution So Vc =Ve -t/CR -t/CR =...
  20. KiNGGeexD

    Understanding Circuits: Investigating an Unlabeled Circuit

    I have a circuit and in the circuit there is two over lapping circles and I'm not sure what it is because there is no description or anything. I think it is a current or something but next to it is the symbol gm *Vbe and I know Vbe is the voltage between the base and emitter but what is gm?
  21. N

    ODE for 2 RC circuits in series

    Dear all, I have problem to find the differential equation for my circuit shown in the attached picture. For input I have a current source, and the output is the voltage U (the voltage between the first and the ground node). I need the ODE to find the mathematical response of the system...
  22. M

    Why Are Circuits so Complicated?

    Circuits are used to get electricity to the right conditions needed for a certain product, this I know. But, why are there so many resistors, capacitors, integrated circuits and transistors instead of one of each to get the electricity to the right voltage, current, etc. I know this is probably...
  23. N

    Engineering Do electrical engineers only work with circuits?

    My question is just like my title. Do electrical engineers do anything besides circuit work? Because I would like to learn more about guys career but circuits is all I find.
  24. F

    General Question about circuits

    Homework Statement I have a general question concerning circuits. I am a bit confused as to how to determine when the current is negative. For instance, on circuit diagrams, we are shown arrows that indicate the positive direction of current. Then, when we open the switch on the circuit...
  25. A

    Does Grounding Alter Voltage Differences in Electric Circuits?

    The term ground has always confused me. For instance: I have always thought of a battery as a collection of negative charges at the -pole and positive charges at the +pole. But with this picture what does it mean that one pole is grounded. To be grounded is I guess ideally to be connected to the...
  26. B

    Possible title: Are These Statements Always True for LCR Circuits?

    In an LCR circuit (circuit with inductor, capacitor and resistor), are the following statements always true? The capacitor voltage always lags the resistor voltage by a phase difference of 90°. The inductor voltage always leads the resistor voltage by a phase difference of 90°. The current...
  27. X

    Engineering Diode Circuit Problem: Find Current in a Given Circuit | Homework Help

    Homework Statement In the circuit below, determine the current through the diode http://img12.imageshack.us/img12/152/jar0.jpg Homework Equations V:IR 3V: Va+Vb The Attempt at a Solution This is my first time trying to solve a circuit problem involving diodes. I first tried to use...
  28. S

    Quick Questions on Electric Circuits (Current directions and Kirchoff)

    Hi guys, i need some help here... 1. I know that by convention, the positive charge of the voltage source is taken to be the direction of current, but I'm confused by this MIT lecture vid that drew the current as appearing to be flowing from the negative terminal. You can see the drawing in...
  29. PsychonautQQ

    Bode Plots in RL and RC circuits

    Hey PF! I have a test tomorrow and some of the material is on the basics of RL and RC circuits set up as high pass or low pass filters. Does a High pass filter bode plot look the same whether it's RC and RL? Same with a low pass? Can anybody to an online resource of what bode plots look like...
  30. C

    RC Circuits charging/discharging

    Homework Statement Plot I_r vs. time and Q_c vs. time starting from when the switch is moved from its lower position to its upper position. Label both axes with numbers and units. Show three time constants. Assume that the capacitor is initially uncharged. After the circuit reaches its...
  31. G

    Engineering Electrical Engineering - Circuits - FET Transistor - Voltage Divider

    Homework Statement Find the voltage gain A_{v} http://imageshack.com/a/img692/3117/qkwp.png Homework Equations The Attempt at a Solution Is this the correct small signal equivalent? http://imageshack.com/a/img203/5812/1yfe.png I'm trying to find the output impedance...
  32. P

    Engineering Mechanical problems converted into electrical circuits.

    Hi, Homework Statement Attached (Q1,Q2) are two mechanical systems I am asked to convert into analogous electrical circuits. In Q2, it was stated that B4 is the friction between each of the three masses and the surface. Homework Equations The Attempt at a Solution Attached (Q1 -...
  33. B

    Proof of superposition theorem for linear circuits

    Can someone link me/explain to me the proof of this theorem? I can't seem to find it online. Thanks! BiP
  34. S

    Solving Q3 of AND and OR Circuits Challenge

    I can't answer Q3 of: A spin-drier has a start-stop switch, but the motor will only spin the drum if the lid is closed. Closing the lid closes an SPST switch inside the machine, and the motor can then be started with the start-stop switch. 2) Draw a diagram of a simple circuit for this...
  35. G

    Engineering Electrical Engineering - Circuits - Transistors

    Homework Statement Given the configuration below http://img844.imageshack.us/img844/3364/c5e8.png Find A_{V} and A_{I} Homework Equations The Attempt at a Solution I start off by drawing the small signal equivalent r_{e} model. http://imageshack.us/a/img268/7201/9e.png I start off by...
  36. C

    Understanding Neutral Circuits: Loads & Current Flow

    In a single circuit I've always understood that a neutral was a return essentially completing the circuit for the current to flow but I know that losing a neutral can cause imbalanced load and burn up equipment, my question is, how is this possible? If I were to open the hot, it would simply...
  37. G

    Why do some resistors have a value of zero in a circuit with a short circuit?

    I am having trouble understanding short circuits and would appreciate some help with it. From what I understand, a short circuit occurs when we have a connection with a very low (zero) resistance is made between two points in a circuit. With R=0, the only resistance in our circuit would be...
  38. G

    Engineering Electrical Engineering - Circuits - Darlington Configuration

    Homework Statement Determine A_{V} and A_{i} given β_{D} = 8000 and V_{BE} = 1.6 V. http://img801.imageshack.us/img801/6272/44tv.png Homework Equations The Attempt at a Solution I'm not exactly sure how to solve this problem. This is a problem that my professor solved in class. The only...
  39. bibo_dvd

    Engineering A Question about Series-Parallel Circuits

    Hello Guys ! In This photos i found that in (a) : RT= 4 Ω+ 10 Ω+ 4 Ω= 18 Ω and in (d) : RT= 10 Ω but i can't understand why in (a) the total resistance equals to 18 and how will the current would pass ?? and in (d) i can't understand why the total resistance equals to 10 and why we...
  40. S

    MHB Simplifying Boolean Circuits: W NAND X & YNORZ

    Find the simplified equation (SOP FORM) corresponding to the following circuit (i.e. apply Demorgan's theorem to bring the negations inside the parenthesis). So is it saying W NAND X which means (w!x!) + YNORZ so (w!x!) + (y!z!) = wxyz?
  41. S

    MHB Drawing circuits with NAND gates

    A cheap way to implement this circuit is to use only NAND gates. Draw the circuit diagram for the lowest cost implementation using these gates. (reminder: you can wire a NAND gate such that it acts like an inverter). $f$(w,x,y,z) = x*y + w*x + \bar{y}*\bar{z} My solution: Will this work?
  42. A

    Engineering Find T-Network Equiv of ∏ (Pi) Network - AC Equiv Circuits

    Homework Statement Determine the T-network equivalent of the ∏ (Pi) network shown in the Figure? Homework Equations I started working on this question and don't know if I am heading in the right direction. The impedances of the T network (Z1, Z2, Z3) can be found from the impedances of the...
  43. G

    Help with PLL Circuits | Get Expert Advice

    Hi guys, How are you all? I am trying to build to a PLL circuits. As part of the circuit, I will need an offset adder, integrator, rectifier, and another stage of offset adder. I haven't done circuits for very long time. So please bear with me if I am mistaken. Appreciate your help. I...
  44. M

    Why is Vi - Vf used to calculate voltage in circuits?

    My question is why did they choose to calculate the voltage across a circuit element as vi - vf because it seems contradictory. More detail is in the document. Someone please answer because this has been bothering me. THank you.
  45. S

    Formation of surface charge densities on wires in simple DC circuits

    Currently using resources like: http://www.matterandinteractions.org/Content/Articles/circuit.pdf http://www.phy-astr.gsu.edu/cymbalyuk/Lecture16.pdf I don't seem to understand why the surface charge densities shown in the pictures are stable. I understand that the densities shown create...
  46. S

    Using direction of current as base for new type of binary circuits

    can the direction of flow of current be used to define binary circuits. can we consider a particular direction of flow as +1 and it's opposite as -1 and no current as zero?
  47. S

    Electric Circuits: Find Vg & Why is it -2V?

    Homework Statement Hi. I have an electric circuit attached below. The question is to find the value Vg in order for the interconnection to be valid. The answer is -2V. My question is, why is the voltage minus?
  48. A

    Detecting if resistances are parallel or series in complex circuits

    I know how to detect when resistors are arranged in parallel or series arrangement and I can also find their equivalent resistance in simple circuits or when resistances are connected in form of triangle but what happens when the arrangement is complex like this : Which resistors are...
  49. A

    Understanding Circuits: How to Analyze and Interpret Circuit Designs

    Hello, I'm in my 2nd year of EE. I have done circuit analysis and some basic into to diodes, transistors and op-amps. We have a class in which we are given circuits for a audio amplifier and a power supply. We are required to understand the circuits completely. How they work and why each...
  50. S

    MHB Analyzing Circuits: Fill in F Column Values in Truth Table

    Analyze the following circuit then fill in the F column values in the truth table for the circuit. Just need someone to check my work. My Answer: X Y Z | F 0 0 0 | 0 0 0 1 | 0 0 1 0 | 0 0 1 1 | 0 1 0 0 | 0 1 0 1 | 0 1 1 0 | 0 1 1 1 | 1 (By the way not sure why my phone is rotating all my...
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