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

    Solving LC Circuits: Time Interval Between Max Current & Voltage

    Homework Statement The total energy stored in an LC circuit is 2J. The inductance is 10^-2 H and the capacitance is 100 μF. What is the time interval between a maximum current through the inductor and a maximum potential difference in the capacitor?Homework Equations T = 2∏/ω ω = √(1/LC)The...
  2. N

    Engineering RL circuits and unit step functions

    Homework Statement http://img828.imageshack.us/img828/1149/70833278.jpg Now this is a part of the solution that was given I was having difficulty understanding. The Attempt at a Solution i(0) = 0 - understood u(t -1) for 0 < t < 1 = 0 I can understand why the voltage from...
  3. A

    Circuits: What does the voltmeter read?

    Homework Statement A E = 12.0V battery with an internal resistance r = 1.80Ohm is connected to two 8.80kilo-Ohm resistors in series. An ammeter of internal resistance 0.410Ohm measures the current exiting the battery and at the same time a voltmeter with internal resistance 17.7kilo-Ohm...
  4. K

    LED parallel circuits and how they function?

    First off, I'm looking at adding in a few LED's into my iPhone 4s (I'm very limited on space, but there is a pretty open area.) I have found a connection point that gives off 2.8v and is commonly used for lighting up LED's with the screen. I plan to add in a red, green and blue 0603 (or even...
  5. H

    Why Does an Inductor Behave Differently from a Resistor in an RL Circuit?

    Homework Statement I'm having trouble understanding how RL circuits work. Here's my understanding so far. Let me know where I'm going wrong. I've provided a reference image. Right after the switch is closed, the current through R1 and R2 is zero. The potential difference for these two...
  6. R

    Engineering Use of superposition in Simple Circuits and Norton equivalent

    The problem statement 7. In the circuit below, the resistor R3 models a light bulb. a) Use superposition to find iX. b) Find the Norton equivalent as seen by the independent current source, iS2. c) Find the power delivered by the independent current source, iS2, in the circuit below. Diagram...
  7. S

    Engineering Flip Flops, and equivalent circuits

    Homework Statement Hey guys, Can someone please explain how the following circuits that I attached are equivalent? I'm not seeing that they are when I develop equations for the output Z. For the first one I get Z=Q1+Q2=(Q1'+Q2')+(XQ2')'=Q1'+Q2'+X'+Q2 For the second image I get...
  8. M

    Impact of Adding Resistor on DC Circuit Current

    Homework Statement Let's say i have a circuit with two resistors connected in parallel with some source. Then another resistor is added in parallel with the first two so what happen to the current in the battery? Homework Equations The Attempt at a Solution Should the current in...
  9. B

    Necessity to discharge capacitors in circuits

    Homework Statement 1. Is it necessary to discharge the capacitors before starting the experiment in series? Why? 2. Is it necessary to discharge before starting the experiment in parallel? Why? The attempt at a solution For the first one, we connected 3 capacitors in series, and the...
  10. M

    Circuits with capacitators connected parallel

    C1 has capacitance of 0.05 μF C2 has capacitance of 0.1 μF C1 fully charged, connected to a 0.4 V battery C2 left uncharged. C1 was disconnected from the battery and two parts joined, allowing the charge to transfer from C1 to C2. Q: Calculate the percentage of charge transferred...
  11. A

    Good notes on wire models in digital circuits

    Hello everyone. I'm trying to do a homework in digital integrated electronics class and feel like I can finish it only if I had a good set of notes. I have problems like comparing the input capacitance of a Mosfet to a wire of certain length, getting RC time loss in a wire, power...
  12. M

    Need to Build Two Circuits That Sense Proximity To Eachother

    Need to Build Two Circuits That "Sense" Proximity To Eachother Hi all, I am trying to build two circuits as part of an experiment that can "sense" proximity to one another. So basically, as they the two circuits get physically closer to each other (starting at a range of maybe 10-20ft), an...
  13. G

    Question about voltage divider rule in series-parallel circuits.

    Say a circuit has a 9V DC supply, a 2 ohm resistor in series with it and also a parallel combination of two 1 ohm resistors in series with it. So a simple series-parallel circuit. What I don't understand is why the voltage drop across the 2 ohm resistor isn't 6V and the voltage drop across both...
  14. S

    Voltage and Current in RC circuits

    Homework Statement A circuit includes a spark gap that connects to the ground. The width of the gap is adjusted so that the capacitor discharges to the ground each time the voltage reaches 99% of the maximum. (The circuit is basically a simple series circuit with an 80v power supply...
  15. M

    (Stressed Electrical Engineer) How Do You Learn to Design Circuits?

    This is probably an extremely awful question to pose at this point, but I feel lost. I'm in my Junior year at 4 year uni after transferring from 2yr college and the jump seems so huge. One of things that is giving me headaches a lot this semester is learning how to design with extremely little...
  16. N

    Engineering Finding independent loops in basic circuits.

    Homework Statement This was a question on my lecture slides which I didn't quite understand during the lecture. Here is the circuit: http://img843.imageshack.us/img843/3548/nodesbranchesloops.jpg The question was to find independent loops in the circuit. On the left-hand side I drew in the...
  17. A

    Understanding the Q Factor in Parallel Resonant Circuits

    hi there..in some places, i saw the usage "the Q factor of parallel LC tank ckt" while in some others, the Q factor of the inductor used in tank ckt is given..are they same?? As far as i know,Q=wL/R is the thing for inductor ,where R is inductor's series resistance..is the formula same for the...
  18. S

    Power Calculation for Three Resistors in a Circuit

    Homework Statement Three resistors are connected across a battery as shown in the figure. (Let V = 141 V and R1 = R2 = R3 = 204 Ω.) http://www.webassign.net/bauerphys1/25-p-057-alt.gif (a) How much power is dissipated across the three resistors? P1 = P2 = P3 = Homework...
  19. C

    Why cooling circuits, in a fridge for example, need a dryer?

    Since they are closed systems, and do not contain water, why do they use a dryer? And how does that dryer works? It uses a dissecant? If so does it need to be changed?
  20. S

    Proving Ohm's Law between 2 circuits

    Homework Statement Hello guys. I've ran into this conceptual problem. I was given into physic's lab to prove Ohm's law by mounting a circuit in two ways, and calculate both Voltage and Intensity. The first circuit, the A (Please refer to Circuit A.jpg), has the inconvenient in which the...
  21. R

    Help understanding RC circuits

    Homework Statement In a problem I have a circuit that I have not set up to know what happens as far as voltages across my battery(4v), two equal resistors and a capacitor. Homework Equations The Attempt at a Solution Because i have not seen a circuit like this I am thinking that...
  22. M

    Capacitor, circuits and how much charge is transferred

    Homework Statement Two parallel plate capacitors, 6 microfarads each, are connected in parallel to a 10V battery. One of the capacitors is then squeezed so that its plate separation is 50% of its initial value. Because of the squeezing, (A) how much additional charge is transferred to the...
  23. A

    Equivalent resistance of tricky circuits?

    equivalent resistance of tricky circuits? Homework Statement what is the equivalent resistance between A and B? Homework Equations kirchoffs law for voltage and current The Attempt at a Solution i got the equivalent resistance between A to C as 3R/4 but i have to find the...
  24. L

    Digital circuits 2-input multiplexer implemented into an and gate

    How do you implement different gates by using a two-input multiplexer? What are the inputs supposed to be? How do you implement an AND gate, for example? An OR?
  25. U

    (Conceptual) questions about capacitors, circuits

    I have (conceptual) questions about this question posted before: https://www.physicsforums.com/showthread.php?t=386071 On the second part of the question (part B: The switch is opened at t = 0s. At what time has the charge on the capacitor decreased to 12% of its initial value?), why does...
  26. B

    Analog vs. Digital Circuits: Which is Right for Me?

    I need to decide whether to take analog circuits of digital circuits. I can always take the other one later. But for now, it's a tough call. I am very into computing and its applications, and I love logic; it seems like digital is the way to go for that stuff. However, I am also very...
  27. J

    DC Circuits - How to Determine a Bulb's Brightness

    Homework Statement The circuit has identical bulbs and an ideal battery. When bulb D is unscrewed from its socket (the socket remains in its place), what would happen to the brightness of bulb F? Homework Equations V = IR The Attempt at a Solution Since bulb D is unscrewed from it...
  28. E

    Engineering Matrix therory - Electrical Circuits

    Theoretic question: is there a way to know if it is no possible to write impedance/admitance matrix (depend on which method we want - volage or currents) just from the circuite connections? Thanks!
  29. E

    Engineering Find Thevinin Equivalent for AB - Electrical Circuits Homework

    Homework Statement I need to find the thevinin equivalent for points AB. The Attempt at a Solution I know the Is current is splitting equally between R1 and R3, but doesn't go to R2 because of the dependent current source. so i thought that through: I(R5) = Is and I(R3)=Is/2 so the...
  30. M

    Engineering Electrical Circuits: Frequency Generator, Tolerance & Reactive Inductor

    Homework Statement 1. How do you expect the frequency generator output voltage to change with increasing load (decreasing impedance)? 2. Explain the meaning of component tolerance. (E.g. Tolerance of a resistor) 3. Is a real inductor completely reactive? Why Homework Equations...
  31. J

    Voltage in series and parallel circuits

    Why is it that in a series circuit the sum of the voltages across the components is equal to the voltage supplied by the battery but in parallel the voltages are equal for different branches in the circuit?
  32. G

    Capacitor Circuit Calculations - How to Find Charge, Energy and Voltage

    Not sure If I posted this is the correct place -Im new ---- hi, I am working on a college assignment. I'm on a day release program and unfortunately I missed the day where we covered this part. Please could someone help me? The questions I need to answer are: a) For each capacitor...
  33. G

    Solving capacitor circuits? Help?

    Not sure If I posted this is the correct place -Im new ---- hi, I am working on a college assignment. I'm on a day release program and unfortunately I missed the day where we covered this part. Please could someone help me?The questions I need to answer are: a) For each capacitor shown in...
  34. M

    What is the value of C2 in the given circuit with capacitors C1, C3, and C4?

    Homework Statement In the arrangement shown in the figure below, a potential difference DeltaV is applied, and C1 is adjusted so that the voltmeter between points b and d reads zero. http://capa.physics.mcmaster.ca/figures/sb/Graph26/sb-pic2667.png This "balance" occurs when C1 = 3.56 µF. If...
  35. N

    Circuits, State-Space Equations, MATLAB Simulink

    SOLVED. Just making the post showed me the answer. Sorry!
  36. M

    Why are the charges on capacitors A and B the same, and C and D equivalent?

    http://capa.physics.mcmaster.ca/figures/sb/Graph26/sb-pic2654.png This is more of a concept understanding if anything but I'm interested to know why the charge on capacitors A and B are the same and similarly, the charge on capacitor C and D are equivalent.
  37. S

    Engineering Circuits - using equivalent capacitance

    Homework Statement C1 = 1μC ; C2 = 2μC ; C3 = 3μC ; C4 = 4μC V = 12.0V If both switches are closed, what is the charge on C1? Homework Equations q = CV In parallel - V is constant across capacitors Cxy = Cx + Cy In series - q is constant across capacitors Cxy-1 = Cx-1 + Cy-1The Attempt...
  38. Y

    Any free simulation programs for transistors, FET and diode circuits?

    Hi, I've been busy in designing some circuits and I want to simulate some non linear behavior of transistors and diode circuits. I want to find a free simulation program. Does LT Spice work on these discrete components? Thanks Alan
  39. S

    Nodal Analysis and Power Balance in AC Circuits

    I'm working on an ac circuit, and we were told to use nodal analysis. Furthermore, we are asked to show a power balance between the sources and the power dissipated in the resistors, along with a reactive power balance between the sources and the inductors and capacitors. I have this formula...
  40. C

    Engineering Answer RLC Circuit Q Factor 70, 5V Supply at 2.5kHz

    A series RLC circuit is connected to a 5 V supply, the frequency of the supply is adjusted to give a maximum current of 11.9 mA at 2.5 kHz. The Q factor is 70. Determine the component values of the circuit. R= 5/.0119=420.2 Ohm Q = (1/R)*(sqrt L/C) 70 = (1/420.2)*(sqrt L/C) 70/(1/420.2)=...
  41. C

    Engineering How Do You Calculate Apparent and Reactive Power in AC Circuits?

    For the circuit given in the power factor is 0.72 lagging and the power dissipated is 375 W. Determine the: (1) apparent power (2) reactive power (3) the magnitude of the current flowing in the circuit (4) the value of the impedance Z and state whether circuit is inductive or...
  42. E

    Current Sources in Parallel when Simplifying Circuits

    When simplifying a circuit, can a parallel branch with a current source and a resistor in series be considered as just the current source? Also, if two parallel current sources 'point upwards' i.e. toward the positive rail, can I add them together as one source even if there are other...
  43. S

    Engineering SOLVING[Series-Parallel Circuits

    Homework Statement R1-10 R2-13 r3-3 R4-6 What should be the total voltage so that I3 = 1A. Homework Equations n/aThe Attempt at a Solution idk to solve it help me plss :(
  44. S

    Parallel Circuits: Intensity of Bulbs When Removing One

    Homework Statement I just need help on a simple question, In a parallel circuit with 3 bulbs, if one bulb is removed, will the intensity of the other 2 bulbs remain the same or increase? thanks much!
  45. C

    Engineering Calculating Shunt Resistance for 200A D.C. Circuits: Step-by-Step Guide

    Determine the required value of the shunt resistance if the maximum value of the current I is 200 A. The meter can read a maximum of 1 mA and has a resistance of 0.1 Ω. My answer is; Rsh: 0.1*(0.1x10^-3)/200-(0.1x10^_3) =0.1/(200/0.1x10^-3)-1 =1/19999990 =0.0000005 ohms Is...
  46. W

    Engineering Understanding the Role of Capacitors in RC Circuits

    Homework Statement What causes integration of V_{in} within an RC circuit?Homework Equations Z= R + X_C = R - j/(ωC) Z is the impedance of the circuit, j=(-1)^.5, ω is angular frequency, and C is the capacitance. The Attempt at a Solution I think integration is the capacitor's way of...
  47. E

    Engineering Solving Electrical Circuits: Find Voltage Vx

    Homework Statement I need to find the voltage Vx. Vs = V0*cos(wt) given: w,R,C,L,V0 I thought doing KVL,KCL but got stuck... is this the way to solve this? is there another way? Thanks!
  48. E

    Engineering  Find Logic Function in NMOS & PMOS Circuits

    Homework Statement Find the logic function (without body effect) Homework Equations Nmos, Pmos current equations (in each state of the transistor). The Attempt at a Solution I am looking at the circut and get confused :( don't know where to strart from... help please? ...
  49. S

    Engineering Simple beginner question in Electric Circuits Course (Is the solution wrong?)

    The reason why I am suspecting the solution is wrong is because the final step is dividing something with units of electrons/min by something with units of electrons/meter. Am I right about the solution being wrong? If I am wrong, then what am I not seeing? If I am right that the book is wrong...
  50. W

    Engineering How Do I Solve This Node Equation in a Circuits Problem?

    Homework Statement Homework Equations I am trying to do some self study here before I take my circuits course. I am stuck on this problem for some reason.. The equation I am coming up with for the node is : 6 - Vo/2 - Io/4 - Vo/8 = 0.. After getting at equation I can't seem to come to...
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