Circuits Definition and 1000 Threads

Homework Statement The question is given in the thumbnail... Homework Equations R = resistance P = power V = voltage I = current [/B] R = V / I P = V * I P = I * R P = V^2 / R The Attempt at a Solution The attempt at a solution is also given in the thumbnail... I know that...

I have uploaded an image of the situation I am looking at. Essentially, the Thevenin voltage is being found, and one thing I don't quite understand in this example is the text saying R2 can be neglected when trying to find the Thevenin voltage. It says R1 and R3 form a voltage divider, but I...

Homework Statement I have to prove that RI = RSRP/(RS - RP) by circuit analysis. The Attempt at a Solution [/B] So I tried to create a system of equations to do this: For the first circuit using kirchhoffs rules: V-IA(RS + RI) = 0 [1] For the second circuit: V-IBRS - IPRP = 0...

Homework Statement Prove that current ##I = I_0\sin{\omega t}## can be rewritten as ##I = I_0 e^{i\omega t}## Homework Equations Euler's formula ##re^{i\theta} = r(\cos{\theta}+i\sin{\theta})## The Attempt at a Solution If ##r = I_0## and ##\theta = \omega t ## then ##re^{i\theta} =...

Homework Statement What is the potential difference across each resistor? I know that I'll have to incorporate the V=iR equation but I don't know where to start though... My first attempt was with these: R1=4 R2=8 R3=5 R4=6 R5=3 24-I1R1-I1R2-I3R3+I4R4+I5R5=0 but this lead me nowhere so I...

Homework Statement The circuit to the right consists of a battery (V0 = 26.0 V) and five resistors (R1 = 211 Ω, R2 = 682 Ω, R3 = 363 Ω, R4 = 534 Ω, and R5 = 465 Ω). Find the current passing through each of the specified points. The Circuit http://i.imgur.com/4JSIHdG.png all I need to find is Ih...

Homework Statement Homework Equations ##a + bi## complex notation Rules of resistors given in part b b = imaginary part The Attempt at a Solution For part (a) how do I rewrite I(t) as a + bi? For part (b) I need a formula that equates Z to R. For part (c) do I simply write b (from part...

i have just started taking electric and electronic circuits course and i have a question about a basic concept in KVL, regarding the loop direction that you assume in any circuit : does the loop direction that you assume is just telling that you will subtract the voltage of the near points from...

Homework Statement I am attempting to understand this example shown below: Homework Equations During stead state DC, the capacitor is an open circuit and the inductor is short circuited. The Attempt at a Solution [/B] The questions I have are really related to the concepts as I don't...

Is it possible to have one part of the circuit running with electricity then manually add in a second part of the circuit to the first part and have both running simultaneously? Is there a name for such a circuit? The voltage and current of the first part of the circuit would change because of...

Look this schematic picture: S means source and can be a current source or a voltage source. C_1, C_2 and C_3 are linear components, can be resistor, capacitor and inductor. In the everycircuit, I tried set up all possible combination and the everycircuit denied some combinations, but...

Why can't Kirchoff's Laws be applied to a non-conservative circuit?. I'll be looking forward to a good discussion.

Homework Statement The Matricial Circuit of a certain circuit in time-domain is: [ -1 D+a] [v1(t)] = [es(s)] [D+2 -1] [v2(t)] [0 ] where a is constant >0. Find G1(s) = V1(s)/Es(s). Put your result in a relation of polinomials N(s)/D(s), with the D(s) monic polinomial...

Homework Statement I'm in a lab and we have this circuit & question as part of the pre-lab The Attempt at a Solution I began trying to use nodal analysis to get Va & Vb & to then use Vab to get the voltage and then the current but after doing what you can see above, I stopped because I...

hey guys I am at the point in my college career where i am about to fail my first class (intro to circuits) and I am an ee major (prob a bad start to my major classes). I am probably going to take it again next semester but can people chime in on how to come back after failing a class; the...

Homework Statement Please see attached image 1 and image 2 Homework EquationsThe Attempt at a Solution Alright so I believe I solved part a correctly. It was very easy. (A) 5 * phasor of 30 degrees However it's been a while since I took circuits 1, so I'm struggling a bit with part (b)...

Homework Statement Hello everyone, I have recently come under some stress from not being able to get these answers correct. I need to calculate these values: Zeq IT XL2 XL1 VR1 VR2 VL1 VL2 For this series circuit: And these values: Zeq IT XL2 XL1 IR1 IR2 IL1 IL2 For this parallel circuit...

Homework Statement For the RC circuit shown in Fig. 1, at some frequency the peak voltage across the capacitor and resistor are equal. Find the frequency at which this occurs. Show that the peak voltage across the capacitor or the resistor at this frequency is given by Vin/ √ 2. How would this...

First doubt: The impedance Z is defined how Z = R + j X and the reactance X can be wrote how: Source: https://en.wikipedia.org/wiki/Electrical_reactance So, by analogy, the admitance Y is defined how Y = G + j B and the susceptance B can be wrote how what? So: B = \left( \frac{\omega C}{1}...

It is my first time learning about power in circuits. From reading my electric circuits text, I understand that when current enters the positive terminal of a circuit, power is being "absorbed" and when it enters the negative, it is "supplied". The book doesn't really go in depth on what those...

Homework Statement Homework Equations While equations should be unnecessary to solve these questions, I am not sure if I have done so properly. The Attempt at a Solution Well, I placed my answers on the paper already. I am unsure about the potential difference between 12V and 5V, as since...

Homework Statement Find currents through M and N Homework Equations Current out must be current in. The Attempt at a Solution I think that it is simply 3 parallels running with 5A of current. So, M is in series with the 2A current thus also has 2A of current. Would N also be in series with...

Homework Statement I took a few pictures of the circuit, it went across two pages so I took a few pictures, and closeups of certain parts to ensure that all the details can be seen For the circuit: http://s7.postimg.org/ywd4nrmsq/IMG_20150905_140403187_HDR.jpg Figure 1. Overview of Circuit...

Homework Statement List the order of brightness of each bulb (while the switch is open) assuming the bulbs are all of the same resistance. Homework Equations Ohm's Law: Change in voltage = current divided by resistance The Attempt at a Solution I know that bulbs A,C,D,F are all equal in...

Hai pf, Can anyone suggest me what are best referrences to design & study about circuits. In case of designing ICchips also? studying about flipflops,counter. they are still confusing? if anyone had an idea please suggest me easy way to understand their workings? thanks in advance.

I've been building a 3 phase delta wired alternator. I recently cast the stator in fiberglass resin, and now i get no response from the terminals. Before casting, I used the multimeter's resistance setting to test the connections between each pair of the three terminals, and all registered a...

In this paper (http://science.uniserve.edu.au/school/curric/stage6/phys/stw2002/sefton.pdf) the author describes the transfer of energy in an electrical circuit as follows: "To explain energy transfer we need to look at what is happening outside the wires. As a consequence of the surface...

Homework Statement A battery has an emf E and internal resistance r. A variable resistor R is connected across the terminals of the battery. Find the values of R such that (a) the potential difference across the terminals is a maximum; (b) the current in the circuit is a maximum; (c) the power...

I am curious about the concept of distinct circuits/systems of neural activity that give rise to basic emotions. I drew this info from the article below, which focuses specifically on "three kinds of emotions of love" by Helen Fisher (who got popular through her viral TED talk about love)...

I'm studying more (odd) circuits, where Kirchhoff law's would fail because of a magnetic field being part of a circuit, and it's flux is changing. For example this circuit: PS(##V_P##)is an external power source connected to the circuit, where there is a wire that an external magnetic field...

Homework Statement http://i.gyazo.com/c6b73ca3a53b7d36bce59a0aa5009d27.png Homework Equations Kirchhoff's Current and Voltage Laws, Resistors in parallel and in Series. The Attempt at a Solution The main thing confusing me is the diagonal 6 Ohms, not too sure what it is parallel too and how...

Hey all, I would like to ask your recommendation for analogue electronic circuit analysis textbooks ( diodes ,transistors and op amps etc... ) dealing with the following topics Logic gates general description and their application using analogue electronics Op-amps: 1)Non-ideal model of...

What's up people? I'm new in this wonderful forum. I have several questions about circuits, and they are not really common, I mean, I find them somehow complicated, but I would really come to enlightenment if you guys gave me some clues. 1.- So, let's suppose we got the simplest circuit, a...

Homework Statement Hi all, I have a question about using peltier cells for both cooling and reading temperature in the same moment. I need to cool down a couple of Integrated Circuits so I'll put put a 20mmx20mm peltier cell over them but I cannot read the cold side of the cell because it's...

Homework Statement We conducted an investigation into wire length, current and resistance but kept track of the voltage rather than relying on the power pack setting. We noticed the voltmeter (measuring across the power pack) reading increased as the length of the wire increased though by only...

Homework Statement Can someone please give me insight on how to solve for the total resistance of this circuit? Thank you Homework Equations The Attempt at a Solution

I am just beginning to educate myself about electricity and computers. Every time I read something I realize my ignorance is even greater than I imagined. For instance, I was stunned to learn that the drift speed of a typical current is so slow. An AC circuit generates an electromagnetic field...

I'm having a bit of trouble wrapping my head around why inductors behave the way they do in certain circuits. Every physical explanation for why ##V = -L\frac{dI}{dt}## that I've seen explains how the voltage across the inductor is developed as the current changes: the changing current means a...

good evening to all if two ideal cells with emf 6 volt and 3 volt are connected in parellel to supply current how the net emf can be decided

Power Source at 6.0V a) Voltage drop across the parallel branch of the circuit: 0.25V b) Voltage drop across the light bulb connected in parallel: 0.25V c) Voltage drop across the light bulb connected in series: 0.5V 2) How would you measure the current through the entire circuit: By putting...

Homework Statement If you measure the resistance of the three lightbulbs (independently) and get the following values. What is the equivalent total resistance of the circuit, and it’s uncertainty. R_1 = (50 \pm 7) \Omega, \ \ R_2 = (720 \pm 30) \Omega, \ \ R_3 = 140 \pm 20) \Omega Now you...

There is a conservation law for superconductors " the flux through a superconducting ring cannot change". This can be shown using Faraday's law: - E.M.F=-d/dt (BA) where B is the measured magnetic field passing through the ring and A is the area enclosed by the ring therefore for a ring...

Hey everyone! I'm doing this simple exercice from Halliday's book, where I have to find some intensities at some points... anyway after solving it, I realized that only looking at point b,and using Kirchoffs loop rule, the voltage at the negative of E1 and the voltage at the negative of...

I am a mech engineer. Basically i want to start learning electronic circuits with interactive animation like how flip flop works etc. Can suggest a cd to purchase.

Homework Statement (See image) 2. Homework Equations C=Q/V The Attempt at a Solution Part a took a while but I now understand that the electrons gather on the right plate of the 2μF capacitor and on the right plate of the 4μF capacitor. This imparts a negative charge of 133μC on each...

I have charged two capacitors in series with a 100V cell such that now, there are electrons on the inside plate of one and the outside plate of the other, bunched up so that they incur a negative charge on each capacitor of 133micro coulombs. Now, they are just connected to one another with a...

Homework Statement 1.) If the time to achieve ½ the maximum voltage across the capacitor in an RC circuit is 0.45 s, what is the capacitance in the circuit if the resistance is 150 ohms? 2.) For an RL circuit, the voltage across the inductor drops from 4.0 V to a constant 1.5 V as a current...

Homework Statement This isn't a homework problem per say but I am struggling with what we are doing in class at the moment which is to do with circuits with two sources of Emf. More specifically, how one source can be used to re-charge a battery. I have looked at the following website which i...

Homework Statement A transformer has a turns ratio of 5 : 1. It is connected to a 230 V supply and an output (secondary) current of 2.7 A is measured. If the transformer is 90% efficient, calculate: Secondary voltage Input (primary) current [/B]Homework Equations...

Homework Statement The resistor R in the above figure has a resistance of 19.1 Ω. a. Find the current in the resistor R. b. Find the current in the 10-Ω resistor. 2. Homework Equations Kirchhoff's Laws (Junction Rule and Loop Rule) V=IR The Attempt at a Solution I figured out part a (I...