# 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. ### Design an opamp circuit with this transfer function on 3 voltage inputs

TL;DR Summary: Build a circuit of given operation on voltages I'll appreciate any help. I need to create circuit of this operation on three voltages: We'll use circuit of voltages summer: The third term is the integral of U_3, so we'll use integrator: Than, calculate capacitance: And on...
2. ### Series-Parallel Circuits (R/2R Ladder Networks)

This is the figure given by the question. Here is the redraw of above circuit. What I request to ask are: 1. Is my redraw is correct or not? 2. The Vout asked in the question is referred to the voltage after passing throgh R8? Thank you for your answers.
3. ### Solving Current & Power in 4 & 3 Wire Circuits

My thoughts were I could use mesh current analysis to derive equations for current hence power in each case in terms of ωC and R, set the equations for real power equal to each other and solve for R. While ωC are known I opted to leave them as letters thinking this might make life easier when...
4. ### I Why NAND & NOR Gates are Necessary for LATCH Circuits

Why we cannot make a LATCH circuit with logic gates other than NAND and NOR gates.?
5. ### Thévenin and Norton circuits Exercise

Figure: My attempt at a solution: a) ##\boxed{V_{TH}}## Current source equations ##\rightarrow \boxed{2=I_2-I_1}## Control variable equations ##\rightarrow V_1=4I_2\rightarrow \boxed{0=4I_2-V_1}## Super Mesh ##\rightarrow -0,5V_1+2I_1+I_2(4+8)-8I_3=0\rghtarrow...
6. ### Exploring Audio Signal Manipulation with Circuits

I'm just playing around with circuitry, working with manipulation of Audio Signals in active circuits(My guitar, going to build an internal preamplifier). I've been trying to find an answer on this all day with no luck. As eager as I am to see what the effect would be it would be nice to know...
7. ### RC Circuits: Measuring Capacitance

I thought that if the slope of the T versus R graph is 4.00μF, then the capacitance would be 4.00μF but it says that's wrong. I know I'm doing something wrong but I'm not sure how to approach this problem. Can someone help?
8. ### Recommendation for a platform for drawing computational circuits

Homework Statement:: I need to draw circuits involving quantum gates and quantum states I would like a platform that allowed me to draw quantum computation circuits. That is, that it provides me with the schemes and allows me to write in latex. Many thanks in advance.
9. ### Circuits and lightbulbs

As demonstrated by the figure, bulb A and bulb are in a parallel circuit whose batteries are ideal and identical. I am asking for assistance to see where I am going wrong in my approach and how to better understand and figure out the question! 1. If the switch was closed, the brightness of bulb...
10. ### Engineering Black box which contains 5x 1ohm resistors

You are given a black box with three terminals, as shown below. The box is known to contain five 1-ohm resistors. Using an ohm-meter, you measure the resistance between the terminals to be the following: A - B: 1.5 ohms B - C: 3 ohms A - C: 2.5 ohms Determine the configuration of the five...
11. ### I CQED understanding superconducting qbits circuits

I have read a little about cqed, "circuit quantum electrodynamics". I would be interested in references to dig a qbit deeper in this topic! I have seen lumped circuit diagrams for superconducting qbits. The correspondance between classical and quantum models for these circuits is really...

13. ### Explicit Calculation of Q Factor of Loaded Tuned Circuits

I would like to discuss in detail an interesting aspect dealing with general considerations and methods to calculate the Q factor of oscillating systems on the example of this regenerative receiver. Althought it is closely related to the discussion here discussion here (especially Baluncore's...
14. ### I Energy Flow From Battery to the Light Bulb

When we connect tungsten filament light bulb to the battery, filament becomes hot due to electrons losing kinetic energy in the electric field inside of conductor. Heat is eventually converted to electromagnetic radiation making light bulb shine. Light energy comes from flow of electrons and...
15. ### Simultaneity in circuits

Let us set up a very simple circuit, with two resistors in series as shown in the sketch. We know that for this particular circuit ##V_{14} = V_{12} + V_{23}##. But what I have always wondered is: How does the circuit "know" that once I introduce a battery of ##8 V## that each of the bulbs...
16. ### Engineering Applying Thevenin's theorem to AC circuits

So I've seen other threads on here with the same problem from a few years ago, and I'm just not getting the same answers. However, I followed along with a similar problem in the textbook and used all the same methods, so can't understand where I've gone wrong, or if I even am wrong. Also not...
17. ### I am having some difficulties solving a combination circuits problem

I'm having difficulties finding the current for a 9-ohm resistor only, not the 20-ohm My attempt was to find the voltage of a 20ohm resistor which is V = (0.75A)(20-ohm) = 15V. I got the 0.75A by adding the currents of the two resistors (8-ohm and 16-ohm) together that were in parallel and it...
18. ### Two basic diode and capacitor circuits

Hi there! I have resolve this basic circuit, but, i have a little questions about. The first circuit its: The diode in all voltaje cases act like a switch, so, the courrent of all components and voltage of the resistance its zero. I graph the curve according my interpretation. My question its...
19. ### Analogue Circuits Question -- AC and DC currents through a coil

Summary:: . Hi ,so am currently doing homework , and was wondering if anyone could tell me if i have done my calculations correctly ,because am not 100% sure that i have answer to those 2 questions correctly .If i have went somewhere wrong if you could tell me where and how i could fix it...
20. ### Engineering Resonance in AC circuits

Here's my attempt at a solution.
21. ### Engineering How to deal with dc source on ac circuits?

We are tasked to solve for the steady state voltage v using superposition theorem. I start with solving with voltage source using mesh analysis and got the current flowing through the 3 ohms resistor and get the first value of the voltage which is 3.2cos(6t+126.87). Now my problem is I am...

23. ### How to understand power stage circuits with transistors (undergrad level)?

Hi, When I look at some circuits, I often get overwhelmed when there are transistors and diodes and I have no idea how to make much sense of it at a detailed level. For example, in this power stage B amplifier, what is the point of the resistors ## R_1 ## and ## R_2 ## in the circuit...
24. ### Finding Magnetic Field of a Toroid with Two Circuits

I have a toroid with square cross section and 2 different circuit: ##C_1## where ##N=N_1## and ##I=I_1## ##C_2## where ##N=N_2## and ##I=I_2## I have a question that say I have to find the magnetic field ##B## produce by ##C_1## everywhere inside the coil. I assume here I have to find the...
25. ### Help me revise (basic electronic circuits questions)

https://www.physicsforums.com/attachments/281345
26. ### Create a Phasor Diagram for Steady State Circuits

So all we have to do is find the current and power distribution in the steady state circuit. Create a phasor diagram. I don't exactly know how to tell it in english, but i think there is a thing I called c. & p. paths.
27. ### Series rlc circuits

Summary:: About resonant frequencies A series RLC circuit with R = 250 ohms and L = 0.6 H results in a leading phase angle of 60° at a frequency of 40 Hz. At what frequency will the circuit resonate? Answer is 81.2 Hz but i got a different answer. May someone please correct me.
28. ### Circuits - AC circuits / phasor

Hi, my school has no answer key provided. and would like to check if this is correct. Thanks!
29. ### Circuits - Transfer function of this LRC circuit

Got B = 9. My school doesn't provide answers, hence could someone double check if my answers is right? Thanks!
30. ### How to distinguish between linear and non-linear circuits?

Many circuit analysis techniques only apply to linear circuits. I don’t quite understand how to distinguish between linear and non-linear circuits. I understand the mathematical concept of linearity. I understand why components like resistors, capacitors and inductors are linear. I don’t quite...
31. ### Engineering Complex Thevenin's Circuit

So I've been absolutely stumped on this one. I've tried about a million different things but none of them have seemed right. A combination of the odd layout of the circuit, and a combined voltage/current source are making things really complicated for me. I'm somewhat sure the RTh is 15kΩ due to...
32. ### Engineering Norton's Theorem -- Help checking my work please

So I've just learned Norton's Theorem and I have this problem on my homework assignment that is wrong. I've checked the answer with a circuit simulator(PSPICE) and the simulation said that V0 should be a drop of 2V. However, my simplified circuit shows a voltage drop of 4V. I have been staring...
33. ### Simulating op-amp circuits using Multisim/Matlab

I tried to simulate the circuit shown in fig 1 using Multisim and here's my work: The result: I do not know where is my mistake, could someone help me figuring out the problem? Any help would be greatly appreciated!
34. ### Understanding RLC Circuits: Series vs Parallel

I'm a bit confused with RLC circuit. If in series, IL = IL, max * cos(wt) If in parallel, IL = - IL, max * cos(wt) Are these correct?
35. ### Olympiad AC Circuits Problem

The problem is shown below: (I am only asking about part b) ^Above is the problem. Below is the solution to part b. They have claimed that we can set potential at C = D = u(t), and A=B=0. Why is this claim true? What I realize: By applying Kirchoff's across ACDB, Voltage across C1 = Voltage...
36. ### Theory question about neutrals in circuits

Ok, first I want to say that I am an electrical engineer. I want to be very clear that I am trying to understand a specific situation that I came across. I am searching for an answer of why and how this situation could happen. I don't want a solution for the problem, just a theoretical, physical...
37. ### The potential difference/EMF in RL circuits

I would like to share my understanding of both of these questions. For Question (1), the inductance L is releasing its stored energy to be dissipated by the resistance R. As time passes, the voltage across L is decreasing and thus the potential difference across the resistor will be close to 0...
38. ### Engineering Finding Time Constant T Without L for an LR Circuit

Edit: Picture of the Circuit (Simple RL circuit) The value of L is not given. Attempt to Solve for T by Rearranging Equation 1: I rearranged the equation to solve for T, using Ohm's Law so solve for I = V/R at each time. https://www.desmos.com/calculator/qlb2n6w4bg This graph is...
39. ### Understanding Energy Loss in 2J Circuits with Changing Capacitance

I am given the answer is 2J and I know how to get there with U = q^2/2C. But what I don't understand is that why is the energy not conserved here? How can energy loses just because the capacitance is doubled?
40. ### Circuit theory - Resistor function for dynamic non linear circuits

Hi, I'm reading the following paper (L. Chua) about the state-of-art of dynamic non linear circuit analysis -- Chua_Dynamic_Circuits I've a doubt about Theorem 2 on section 3.2 On the Existence of the Resistor Function that establishes sufficient conditions for the existence of network...
41. ### Circuits and the Speed of Light (2)

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-14/circuits-and-the-speed-of-light/ Sorry, my other post must have been too brief. In another thread shut down by Dale, this very site (allaboutcircuits) was used by him to reference wave guides. This particular page is 100%...

43. ### I Equivalence of these quantum circuits

In the attached image, there are two quantum circuits that are equivalent. I am trying to understand how. Let's call the top qubit ##q_1## and the bottom one ##q_2##, and the outputs ##q_1'## and ##q_2'##. From what I understand, the C-NOT gate doesn't affect the control qubit. Because Hadamard...
44. ### B Difference between RC and RRC circuits

Circuit A(RC) Circuit B(RRC) Hi guys, the thing I don't get is why the maximum charge of the A capacitor is ##q_{0}=C\cdot EMF## whilst in the other case you must consider the drop in tension caused by the first resistor, so the maximum charge of the cap is ##q_{0}=C\cdot (EMF-V_{R1})##. Aren't...
45. ### Mosfet, Mesfet vs Bipolar transistors in RF circuits

I was wondering in general what types of semiconductors are used in most solid state RF power amplifiers like the ones at cell base stations and elsewhere. Do they use mosfets etc which can only switch a square waveform or are bipolar ones also used that can output sinusoidal outputs that can be...
46. ### Engineering Calculating the unknown voltages in ideal op-amp circuits

Hi - I have made an attempt at both of these circuits, but I am not 100% sure I am correct. Would it be possible to check if I have this right, and if not, please give me some pointers as to where I have gone wrong? Thanks First op-amp Given data: Vo = 5V I have called the voltage feeding into...
47. ### Help With Shrinking a Circuit/Making it Fit Into a Tight Space

Attached is the schematic for the circuit. It uses a TPS61042DRBT LED driver along with a PSoC 4000 8pin microcontroller to drive a 10mA LED with push button controls for brightness. The problem is some components, like the inductor and sense resistor is way too large (over 6mm long!). This is...
48. ### Why is the current the same in series circuits?

If the current goes through the first end of the resistor will it be less than on the other end of resistor?
49. ### Finding the potential difference of a diode

I've tried doing it but i haven't been able to find the resistance of the diode.
50. ### Current circuits problem

https://www.physicsforums.com/attachments/267955 I think i should apply kirchkoff rules so I can find i1,i2,i3 R1,R' but I don't have enough information and I don't know how to have those informations .What is your ideas?