Circuits Definition and 1000 Threads

Homework Statement Consider the circuit which consists of two ideal inductors L_{S} ,L_{P}. These inductors are magnetically coupled with mutual inductance, M. It is possible to replace these magnetically coupled coils by three coils which do not share magnetic flux linkages. The two...

Hi all, I have a general query about voltage drops. Below is an example of the sort of question i am dealing with. If we have: a series circuit with a 14v dc supply, with a resistor of 200ohms and an inductor with inductance 0.6H use the exponential equation to work out voltage across the...

Homework Statement http://s13.postimg.org/l780tdg1z/screenshot_33.png it's b ii) Homework Equations none The Attempt at a Solution well, I just drew a capacitor in series with the load, but when I looked for the answer it was written that it has to be in parallel, I just wanted to...

I understand the concepts of whether a resistor is in parallel or in series with each other. But I thought of a weird case that i can't seem to find examples for. http://imgur.com/b2YMOnAIn this case, would R3 be in parallel or in series to R2? Or could this just be an impossible case? Thanks...

Hi guys, I've realized that to truly, deeply, and fully understand something it often helps if you think about the conservation of energy, and then just build up from that. So here I have tried to explain why a battery has a voltage, and why there are voltage drops across resistances...

Homework Statement "A capacitor is being charged from a battery and through a resistor of 20kΩ. It is observed that the voltage on the capacitor rises from 10% of its final value to 90%, in 15 seconds. Calculate the capacitor's capacitance. t = 15s R = 20kΩ Vi = 10% of max Vf = 90% of max...

Hey. Say you have an RLC circuit with an AC supply. Then I=ei(ωt-α). My question is: will α always exist, ie will the current always be phase-shifted compared to the voltage, as long as the impedance has an imaginary component or if the circuit is not at resonance? Does Z = |Z|*eiα, where α =...

When doing calculations on AC circuits, what is in your opinion the best notation? Here they mostly use complex notation. For example: V(t) = Vmaxeiωt. In US textbooks (at the non-EE level), they only use ordinary notation. Example: V(t) = Vmaxcos(ωt). I have a feeling that complex notation is...

Let's say you have a sine wave V=2sin(2t) V. For this peak to peak voltage is 4V. Then let's say that everything below V=0 is cut off. Is the peak to peak value for this just from 0 to 2V? Making Vpp=2V?

Find the phase angle between i_1= - 4 sin(377t+55) and i_2= 5 cos(377t-65) The Attempt at a Solution Ok, so I converted i_1= 4 cos(377t+145) and i_2=5cos(377t-65) According to lectures in class the 'most' negative leads. So in this case i_2 leads by -65-145=210. However, if you look at the...

Hello, I was curious, if two resistors are separated by a battery (i.e. a circuit looks like battery -> resistor -> battery -> resistor), are the resistors in series? Similar idea with a capacitor. Also, are the resistors parallel if there is a junction that contains a battery and a...

I know that if 1 and 0 goes through an OR gate, it gives 1. But how does the 1 come? how it works? thanks

On tests and homework in my electronics class, I have big problems trying to figure out how to analyze circuits to get information about various values such as Vout and Vin based on the specific circuit given in the problem. The questions we get are such that I need to draw a Vout vs Vin graph...

Homework Statement This was a part question and I got everything else but one part (#4!): 1) A 60-Hz generator with an RMS potential of 240 V is connected in series with a 3350 Ohm resistor and a 1.5 microFarad capacitor. What is the RMS current in the circuit? IRMS = 6.34 * 10-2 A...

Hello, At the moment, I am writing the theory portion of my lab report. In the RC circuit, will the electric potential across the capacitor be at the same electric potential as the battery? Or will it depend on the voltage drop across the intermediate resistor?

Homework Statement Find v(t) after t=0, when the switch moves up need to know if i did this right.. V(C1)=V(C2)=10V (this is same for t=0- and 0+) V(infinity)=0V (no voltage source) T=RC=100k(ohm)*(4uF)=0.4 sec. (i got the 4uF by putting the 2 caps. in parallel with each other, because they...

Homework Statement Given 4 Identical resistors, I need to be able to find the 9 combinations of circuits with equivalent resistances Homework Equations Do I just keep flipping between parallel resistor sequences? The Attempt at a Solution I drew 3 different circuits that I...

Homework Statement For the circuit below, the switch has been closed for a period of time long enough for steady state conditions to have been reached. a: Determine the time constant before the switch is opened b: Determine the time constant after the switch is closed c: Determine the...

[b]1. You are investigating how energy is transferred in circuits with batteries, resistors, and a capacitor. First you take an uncharged capacitor and connect it in a simple series circuit with a resistor and a battery. You wait for the circuit to reach a steady state. After a steady state is...

Homework Statement In the circuit shown, find the current in the 20-ohm resistor and the potential difference between points X and Y. Homework Equations The Attempt at a Solution I've never really ran into a problem where the battery is in the parallel branches with resistors...

I have two solutions to the this problem that I've found but they seem strange compared to each other. Solution I All possible paths that work must pass through circuit 5, so we can factor out that probability and tack it onto the end because they are all independent. P(A \rightarrow D)=P[(1...

Hi, Is solid state device physics a must learn subject to design analog circuits. -Devanand T

I am having trouble understanding how to assign polarities to voltage when it goes through components of a circuit and how those polarities determine the sign of the quantities I put in the KVL equation. Attached is a picture of a circuit. The points where polarity matters are labeled 1-14. I am...

Given the power that is needed to be output by the capacitor - P the length of time that the capictor must give off that power - t the maximum operation voltage that the capacitor can operate at- V the dialectric constant of several materials - ε the breakdown field of those several...

two-level NAND circuits plus ROM?? Homework Statement We have three functions, X, Y, Z of the four variables, A, B, C, D. Note: Each part can be solved without the other: X(A, B, C, D)= m(0,2,6,7,10,13,14,15) Y(A, B, C, D) = m(2, 6, 7, 8, 10, 12, 13, 15) Z(A, B, C, D) = m(0, 6, 8, 10, 13, 14...

Homework Statement each phase of a three phase delta connected generator supplies a full load current of 100A at a voltage of 240V and at a power factor of 0.6 lagging. Find: a) line voltage b) line current c) the kVA rating d) the KW 2. The attempt at a solution a) Line voltage = Phase...

Attached is a schematic of interest. Assume same voltage source and capacitance for each capacitor in each circuit. Correct me if I'm wrong, it appears all circuitry comprises two basic types of connection: series and parallel. I'm trying to figure out an approach to determining whether a...

# -> means XOR ' => means NOT AB => means A and B A+B => means A or B Is it possible to build the following 3 functions F=(D#B)+(C#A) G=DCA'+DB'+CB'A' H=DC'B+D'C'A+D'BA+C'BA Using only 4 chips (Build all three functions using only 4 chips not 4 for each function) I have 8 switches...

When constructing a simple circuit with a battery, bulb and a switch, the placement of the battery is unimportant (I can hook up the battery + then - or - then +). So why is it that so many battery powered electronic devices only work if the batteries are inserted in a specific direction?

Hello everyone, I wanted to make some digital circuits with discrete CMOS components but I do not know how to read these MOSFET datasheets properly and I have no idea which models are good for these kinds of projects (for a 3.3V as Vdd and with ground). I know the characteristics of MOSFETs...

I'm just trying to get a conceptual grounding for the circuit problems in our book. So I understand that a circuit maintains a potential difference via redox reactions. The electrons have a desire to flow, so they do so. The potential difference and the conducting wire allow the...

Can anyone please clarify if the current in the primary coil of the transformer follows V(s)I(s)=V(p)I(p) when i am trying to figure out the peak, surge and average current through the primary coil of a transformer in a full wave rectifier. Also, if it does, do I just use the peak voltage or...

I have attached the problem along with the answers. I have a question on both of the questions. For the first question, if the diode is ideal, does that mean it's automatically "forward biased?" The problem statement says "assume the diode is ideal (i.e. has a 0V forward bias voltage)...

Homework Statement Arudino (UNO) is a Microprocessor. As 13 I/O pins and 8 digital pins and 6 PWMs. Homework Equations The Attempt at a Solution the problem is I don't know how I can power it. I don't think the digital I/O plug can be used as a power source. So I don't know where the I/O...

Dear people, it might be a simple question, but I have been on this for over 2 days now and can't find a proper explanation of this anywhere: https://dl.dropbox.com/u/2264519/circuit.jpg Picture a RCL circuit which is kept at room temperature. Now even when there is no current going through...

Homework Statement http://iceimg.com/i/2a/b2/df5d993eb7.png Homework Equations Sorry for the big picture...The Attempt at a Solution Every time i see more then 1 generator i get in trouble... i don't understand here when to add and when to substruct voltages. Is there any difference between...

Homework Statement Well this is the problem: Whats the current in I1 and I2? Homework Equations I'm guessing you use Kirthoff's Laws.The Attempt at a Solution Well, what I did was I broke it up to two different circuits but then it would have two different currents flowing into the 2 ohms...

Is it acceptable to think of a voltage divider as a series of separate circuits all with the same power supply but each with a different set of resistors?

I have the diagram on the right, I've set up a few equations to solve... My calculator tell me mathematical error. can someone point out the error? thanks. http://img21.imageshack.us/img21/5395/imgyqc.jpg

Homework Statement http://edugen.wileyplus.com/edugen/courses/crs4797/dorf1571/dorf1571c04/image_n/n04f090.gif Determine values of the node voltages, v1, v2 v3, v4, and v5 in the circuit shown. The Attempt at a Solution Doing nodal analysis I came up with the following four equations...

Homework Statement Use the circuit shown to answer the following questions. At time t = 0 the switch in the circuit is closed. Answer the following questions after the switch in the circuit is closed. What is the equivalent resistance of the circuit given R1 = 5 , R2 = 5 , R3 = 4 , R4 =...

Homework Statement http://img69.imageshack.us/img69/1973/captureyxs.png Find the Thevenin and Norton equivalent of the circuit above between A and B using the node voltage method. Homework Equations The Attempt at a Solution I place the ground reference at the node with...

Having trouble with some review circuits using nodal analysis :( Homework Statement I'm trying to find node voltages for v1, v2, and v3. I = 3.1A Homework Equations V=IR The Attempt at a Solution My method of going about and solving this was fairly straight forward I thought...

The circuit of interest is attached. The question is to solve for I1, I2, I3, I4, and V_diode. My question is will the variables come out to be numbers or dependent on R?This is how I did it and it depends on R: I3=0 b/c of the open. The branch with the open is pretty much not there. Thus, KCL...

In single phase series circuits, should the current always be drawn along the x-axis and the voltage then drawn with respect to it? E.g. Should Vr be drawn in line with I, VL leading by 90 degrees (pointing upwards) and Vc lagging by 90 (Pointing down)? The reason I ask is because I've seen...

I was wondering how to calculate the magnitude and phase response of any circuit that is neither Low-Pass,High Pass nor Band-Pass. I am asking this because i haven't found anything relevant in any textbooks so far , since the only use standard filters. e.g an AC circuit consisting of an AC...

I attached the circuit. I'm trying to solve for V_out, but I'm stuck. I can solve for it using mesh analysis, but there must be an easier way. I just don't see it yet. Can anyone give me a hint?

So according to kirchhoffs junction rule, all currents entering a node must be equal to currents exiting a node. In this example http://imgur.com/4Zqb21A If we take a node as the point between the 4 ohm resistor, 5 ohm reisistor, and the 20V battery, how would you be able to determine an...

http://imgur.com/6NTHcSe 2. Rtot=R1+R2+R3...+Rn. 2a. 1/Rtot=1/R1 + 1/R2 + 1/R3...+1/Rn. 3. Not sure if I'm starting in the right place. I think R1 and R4 are in parallel combining them to take R4s position. Then R3 and R2 are in parallel.

http://imgur.com/QnyUSp4 2. V=IR 3. I tried combining the the two 10kohm resistors furthest away from the source in parallel. Then combined the top 10kohm resistor with the diagonal 3.3 ohm resistor. Then combining the top resistor and the resistor on the right in series then the...