Circuits Definition and 1000 Threads

Homework Statement Moderators note: link removed. All images should be uploaded to PhysicsForums. Homework Equations V=IR Series in parallel Series in current The Attempt at a Solution I managed to get the current and voltage of R1 and R2. I've been trying to get the next one R3, but haven't...

I built a wien bridge oscillator. But how do I tell if it works? I am very new to building circuits. I recently Starting making circuits on a breadboard. I have not taken any Electronics class. I am trying to learn how to do this.

Hi I'm experimenting with some black boxes and I'm trying to figure out what's their circuit. I can't seem to find what these two circuits could be.. Could someone please help me out? The purple crosses mark which ports are connected to the power source (6V). The yellow marks show how hard...

Hello: I have to ask some question , did anyone know any integrated circuits that have voltage Vcc of few kilo volts what was the catagoeries of that circuits ? And do they different from high current integrated circuits ? Where to read about it ? Best hope

I have a bunch of questions on pattern shield for inductors in Integrated Circuits (ICs). Basically, shields are made using thick metals (less resistance) to reduce the coupling to the substrate (which are more lossy generally) in order to improve the Q factor. They are patterned to avoid eddy...

Homework Statement Find the Thevenin equivalent at terminals a-b V1 = 70V V2 (dependent) = 4Vo R1 = 10Kohm R2 = 20Kohm Homework Equations ##V=RI## ##1/req = 1/r1 + 1/r2 + ... +1/rn## The Attempt at a Solution Found the current i = 1mA by KVL using Vo = 10ki then did source...

I'm fairly sure that everything I wrote in the diagram in the attached photograph is consistent and accurate, but I don't understand how this can be. The rules involved seem to contradict each other. I hope you people can reconcile this for me. It's my understanding that in the diagram in the...

Homework Statement The following circuit is given, and all voltage, current, resistance and power must be found for each resistor. I have found the following information: Vsrc = ? Isrc = .5A Rsrc = ? Psrc = ? V1 = ? I1 = .5A R1 = ? P1 = ? V2 = 2.5V I2 = .25A R2 = 10 P2 = .625W V3 =...

Homework Statement I'm asked to find the thevenin equivalent circuit, the load being ##R_1## ##e(t)=E_0\cos{(\omega t)}## ##R_1=1k\Omega \ R_2=R_3=1k\Omega## ##C=220nF \ f = 250Hz \ E_0=10V## Homework EquationsThe Attempt at a Solution ##Z_{th} = Z_{R_2}//(Z_c+Z_{R_3}) =...

Homework Statement The following figure shows a circuit containing a bulb, switch and battery. Four voltmeters are connected in it to measure potential difference. Which voltmeters give non-zero readings and which ones read terminal potential difference when the switch is 1) open and 2) closed...

Homework Statement Design a circuit with four inputs and two outputs which realizes the functions : f1 = Σm(0,2,4,5,6,14) f2 = Σm(0,1,4,6,12,14) Homework Equations - The Attempt at a Solution Here's my work : 2 levels (NAND / OR ) 10 gates 17 gate inputs 2 levels ( NAND / OR ) 7 gates 11...

I have a 1V battery and a 1 Ohm resistor in a simple DC circuit which generates 1Amp current and dissipates 1 Watt. Now, I place a segment of the circuit with a straight wire inside a parallel plate capacitor with a constant 1V electric field that opposes the current. I assume the current goes...

The first picture is a regular ac circuit, where the voltage alternates between 240V/0V in one of the wire. The second picture is a live/hot & neutral ac circuit. Are these 2 different type of circuits? And if I connect the top circuit to the ground which makes it neutral (just like the pic in...

Homework Statement Homework Equations none The Attempt at a Solution I want to find the relationship between B and r. So, i have to change r. Do I just change the coil completely with a new one? I believe that this could greatly affect the set up and I don;t think it is practical. OR is...

Hello, This problem is about a.c. I am used to simply using basic a.c. supply symbol in circuit diagrams. Here, I need to draw the set-up for an experiment where I can change the frequency of the supply (not the voltage) and see how this affect the peak current through a coil. how can i...

Homework Statement [/B] State and explain whether or not current will flow through the lamps in these circuits Homework Equations None The Attempt at a Solution I am confused with figure 6 as my explanation is different from my textbook's answer. My textbook says: "Figure 6 – the lamp is...

How is symmetry used to solve electrical circuits? I have seen several problems in books in which currents in two resistors are said to be equal due to 'symmetry'. That is a concept that I fail to understand and thus cannot apply. In class, we were shown a few circuit diagrams which were...

Hello, We just finished up midterms and I actually did well--got an A. However, somehow between the midterm (class before last) and last class we jumped to creating a circuit with a diode. I am pretty lost. 1. Homework Statement Homework Equations Voltage / Current = ResistanceThe Attempt...

Hi, initially I have seen that when circuits are exposed to high frequency kirchhoff laws become invalid. According to my search I can not find any derived circuit equations for that case, instead computational electromagnetism method is suggested using maxwell. Is it the only way to make...

Do they have to know advanced math to design and construct circuits? What kind of math goes into design and construction of a circuit? Can you let the software simulation take care of that? Do you really need to know the voltage across a capacitor? How about the time constant of an RL Circuit or...

Homework Statement Question: For the circuits shown in Fig. 6, voltage meters and ampere meters are used to measure the voltage across the load and their current flow. If the Red Probe is plugged into the “+” terminal of the voltage meter and ampere meter, which circuit(s) show both the...

Hello community, I can't find an explanation for something and I thought I'd come and ask you. I'm studying for a test I have tomorrow and I came across a problem of a three legged steel core with 400 turns on the center leg, the magnetization curve is given, the first part of the problem asks...

Doing circuit analysis everything comes in rectangular loops and it just adds more rectangles. In my Circuit Analysis studies we don't even use the ground symbol. But my teacher referred to the ground symbol once as the reference node which we use in the Node Voltage Method. In reality circuit...

Homework Statement 10 v, 100 hz goes into a circuit of a 1o resistor, a 1o inductive reactance and a 1o capacitive reactance that are in series. What is the current. What is the V across the cap. Homework Equations and the attempt at a solution[/B] So I know I = V/Z and Z = sqrt( R^2 +...

Homework Statement A battery has an emf of V and an internal resistance of r. What resistance R, when connected across the terminals of this battery, will cause the terminal voltage of the battery to be ? A. r= R B. R= 4r C. R= r/4 Homework Equations V=IRThe Attempt at a Solution Req= r+R =...

Homework Statement They give the following circuit. Each capacitor is 50*10^-6 [F], the Resistors are 2[Ω], and the Voltage is 5[V]. In the first step the close only the 1st switch and let the capacitor to be charged. I've found that the charge is 2.5*10^-6 [C]. (using the equation Q = V*C)...

I have to construct suitable circuits to show the operational principles of some sensors: pH meter, sound, light and temperature. Would these count as circuits? or diagrams? (I'd say diagrams). https://www.electronics-tutorials.ws/io/io45.gif I am finding it hard to find circuits showing how...

Hey guys, I have tried and tried to find a start to this problem with no success. My book may have the answer but unfortunately I must be not realizing it. So hopefully I just need a different perspective. Typically I would find the equivalent resistance of the circuit and then begin to...

Im just finishing up my first digital electronics class right now. I know how to design the logic for basic circuits and some slightly more complex ones. I don’t quite understand how to design actual circuits for a few reasons. 1.) When we design “circuits” in class, we just draw them without...

Homework Statement why is there a loss of energy in DC circuits and power loss is reduced in AC when transmitted Homework EquationsThe Attempt at a Solution Loss of energy in a DC circuit is due to the resistance of the wire cauing the wire to heat up therefore energy is being lost by heat...

Homework Statement similarities and differences of AC and DC current in simple circuits. Outline using diagrams and a clear desciption the loss of energy in DC circuits and power loss reduction of AC when transmitted. Homework Equations N/A The Attempt at a Solution DC loses energy over long...

Homework Statement https://pasteboard.co/Hj3g5Km.jpg When both switches 1 and 2 are closed,what is the total resistance of the set up? I couldn't figure out which resistors are connected in parallel and which resistors are actually in series in this set up when both swtiches are closed. I...

I have done an experimeny to investigate how the voltage across a capacitor, Vc varies as it charges and to find the capacitive time constant in a DC RC circuits and Study resonance in an AC inductor-capacitor circuit (AC LRC circuit). I am now having trouble in writing the source of error of...

Homework Statement For a series LCR circuit,the voltage across the resistance,capacitance and inductance is 10V each.If the capacitance is short circuited,the voltage across the inductance will be (a)10V (b)10/√2V (c) 10/3v (d)20V Homework Equations Potential difference across...

Homework Statement I'm stuck at part (b) Homework Equations V = IR (ohm's law) V1 = (R1 / (R1 + R2) ) * V (potential divider) The Attempt at a Solution I started off by thinking which direction conventional current would flow. I concluded that the potential at B will be higher than the...

Homework Statement I have to explain the equation W=VIt and apply it to a circuit. But I do not undertsand what the equation shows. Homework Equations W=VIt The Attempt at a Solution My rough guess is : work done is equal to the time (t) taken for 1A of current to flow at 1V

Hi, this is my first time posting, I'm glad there is a space like this where we can share our doubts and hopefully get some help from other students. As you can see on the image above, there's a KVL applied to the circuit in practice problem 2.6, but my question is the following: On equation...

Hello, I'm currently getting my degree in mechanical engineering but have lately taken an interest in electronics. I've ordered several books and have learned a ton about resistors, capacitors, transistors, diodes, etc. However, every circuit I have made so far has been one that somebody else...

I tried redrawing the above circuit so that it resembles more like the circuit diagrams we see from day to day. However, what confused me was when it asks for the resistance measured between A and B versus between A and C What's the difference between those two, and how would the calculations...

Homework Statement https://imgur.com/3H3pCkD R is the resistance of each resistor, determine total resistance in the circuit. (see the image in the link above) Homework Equations R=1/R₁+1/R₂+1/R₃+... (in parralel circuit) R=R₁+R₂+R₃... (in series circuit)The Attempt at a Solution I'm...

Homework Statement http://www.chegg.com/homework-help/questions-and-answers/ideal-opamp-find-v0-terms-vs-need-help-solving-vp-firstly-understanding-parts-q8278769 Homework Equations I am having difficulties with this problem. It asks to find vo in terms of vs. For the gain, I got an...

I need help understanding what will happen when the switch in closed in this circuit. What I want to happen is for Cap B to charge first and then discharge into Cap C. When the charged capacitor begins to discharge, will it charge Caps B and C at the same time? It will have to overcome the...

Homework Statement Assume that the two balanced loads are supplied by an 840-V rms 60-Hz line. Load #1: Y-connected with 30+j40 Ω per phase, Load #2: balanced three-phase motor drawing 48 kW at a power factor of 0.8 lagging. Assuming abc sequence, calculate the complex power absorbed by the...

Homework Statement Suppose a 120 micro-farad capacitor from a camera flash unit retains voltage of 210 V when an unwary student removes it from the camera. If the student accidentally touches the two terminals with his hands, and if the resistance of his body between his hands is 1.8...

Homework Statement a. What is the net resistance in the circuit? b. What is the current through the 4 Ω resistor? c. What is the voltage drop across the 3 Ω resistor? Homework Equations R12 = R1 +R2 R34 =R3 + R4 1/Rt = 1/R12 + 1/R34 I3=I4 The Attempt at a Solution a) R12 = 2+ 3...

Hi all, I think this issue periodically resurfaces in PF. I have found a similar discussion in this closed post and possibly others. I'm posting this because I'd like to check my understanding, if anyone is available to provide some furtherinsight. So I'm trying to gather a "overall"...

Homework Statement http://www.chegg.com/homework-help/questions-and-answers/interconnection-fig-p25-valid-find-total-power-developed-circuit-interconnection-valid-exp-q22345911 It asks if the circuit is valid, which I assume it is. It asks for the power developed[/B]Homework Equations I tried...

Homework Statement An automobile battery has a terminal voltage of 12.8 V with no load. When the starting motor (which draws 90A) is running, the terminal voltage drops to 11.0 V. What is the internal resistance of the battery? Homework Equations V= EMF- Ir The Attempt at a Solution I think...

Homework Statement There are 2 circuits. A: -A series circuit Components: -Motor -Filament lamp -Resistor B: -A parallel circuit Components: -Motor -Filament lamp -Resistor -Each component is in a separate parallel circuit Question)Explain why the power of the motor is lower in the circuit...

I previously made a derivation of Neumann potential. It can be found in the pdf file below. I originally made it in the ##dx## method. It involved equations like ##dm=I dS##. My maths teacher told that such an expression has no meaning, at least in elementary calculus. However I argued that my...