Circuits Definition and 1000 Threads

can the direction of flow of current be used to define binary circuits. can we consider a particular direction of flow as +1 and it's opposite as -1 and no current as zero?

Homework Statement Hi. I have an electric circuit attached below. The question is to find the value Vg in order for the interconnection to be valid. The answer is -2V. My question is, why is the voltage minus?

I know how to detect when resistors are arranged in parallel or series arrangement and I can also find their equivalent resistance in simple circuits or when resistances are connected in form of triangle but what happens when the arrangement is complex like this : Which resistors are...

Hello, I'm in my 2nd year of EE. I have done circuit analysis and some basic into to diodes, transistors and op-amps. We have a class in which we are given circuits for a audio amplifier and a power supply. We are required to understand the circuits completely. How they work and why each...

Analyze the following circuit then fill in the F column values in the truth table for the circuit. Just need someone to check my work. My Answer: X Y Z | F 0 0 0 | 0 0 0 1 | 0 0 1 0 | 0 0 1 1 | 0 1 0 0 | 0 1 0 1 | 0 1 1 0 | 0 1 1 1 | 1 (By the way not sure why my phone is rotating all my...

hi, I am new in basic electronics course. i m having some problem with simplifying the circuits using boolean algebra. can you suggest me any good book to practice this? and i also need a short chart of the laws.

When the switch is closed, what happens to the brightness of bulb D? What happens to the brightness of bulb A? Explain your reasoning. I initially thought it would decrease because current splits between D and BC. But since it is parallel to BC would it increase because the it would be R/2...

Greetings, When connecting a circuit what does it mean when someone refers to the "ground'. Like for example, when someone says, "ok, we are connected to ground". You know? That is the sort of thing I am talking about.

Homework Statement part 1. at what frequencies will the circuit act as a differentiator? part 2. interchanging R and C of figure D produces a low pass filter. At what frequencies will v_out/v_in = .95? part 3. at what frequencies will the RC circuit of problem 18 act as an integrator? part...

Homework Statement A circuit is constructed with five capacitors and a battery as shown. The values for the capacitors are: C1 = C5 = 4.1 μF, C2 = 3 μF, C3 = 6.8 μF, and C4 = 3.4 μF. The battery voltage is V = 12 V. Picture is here...

Homework Statement A transformer has 600 primary turns and 150 secondary turns. The primary and the second resistances are 0.25Ω and 0.01 Ω respectively and the corresponding reactances are 1.0Ω and 0.04Ω respectively. Detemine the equivalent: 1. resistance 2. the reactance and 3. the...

Homework Statement A coil of inductance 0.20 H, resistance 60 ohms is connected in parallel with a 20 μF capacitor across a 20 V, variable frequency supply. Determine: 1. the resonant frequency 2. the dynamic resistance 3. current resonance 4. Q- factor at resonance Is anyone there...

Hi fellow physicist! I have some trouble with finding a valid argument, for why the superposition theorem should be fulfilled for electrical circuits - there only containing resistors, capacitors and inductors - where the sources of the emf. are connected in series. Thanks in advance.

Homework Statement Find V(L) voltage across load Homework Equations Vg=2cos(wt) Zg=Zl=200 Zo=50 \Gamma=\frac{Zl-Zo}{Zl+Zo} L'R'=με (all TEM lines) μ0=4∏E-7 ε0=8.854E-12 The Attempt at a Solution Basically I think that with the 1st one, i don't have to deal with reflection...

Homework Statement 10) A voltmeter whose resistance is 1000Ω measures the voltage of a worn-out 1.5V flashlight batter as 0.9V. What is the internal resistance? 11) If the flashlight battery of the preceding problem had been measured with a voltmeter with a resistance of 10MΩ what voltage...

My question is regarding Vdb. for pos flow of charge Vbd = -Vdb and Vdb = -VR2 so Vbd = VR2. This means that the current flowing from point d to point b gained potential energy. However the flow of charge from d to b are electrons and electrons lose potential energy as they move from...

How are the circuits (a) and (b) equivalent? i0 is the sum of two currents that flow from high to low potential (flow of positive charge) So why does i0 not flow from high to low pot?

The voltage divider technique was derived from a circuit where the resistors and battery were in series. I want to focus on the the variable V in the following formula. And I only want to focus only on circuits whose elements are all in series with one another (No current division) (VRn =...

Homework Statement Find v. A value for R is not needed. Circuit is attached. Homework Equations KVL, KCLThe Attempt at a Solution I have no idea where to begin with this one. I found an answer using source transformations by transforming the 4A current source into a 12V voltage source in...

Homework Statement Hello! I'm having difficulty analyzing https://dl.dropboxusercontent.com/u/53341615/Circuit%20Diagram.png circuit and determining the currents I1,I2,I3. Homework Equations Ohm's Law Kirchoffs Laws Current and Volatage divider The Attempt at a Solution So far all I...

how would one possibly draw all the possible Eulerian circuits? the way I am thinking of it is if we start say at vertex 1 and go through each vertex and edge and come back to vertex 1 then we can do the same for each vertex up to 5 but then we can also start at vertex one and head a different...

Homework Statement Homework Equations The Attempt at a Solution 12.1.1) I don't understand why V2 would have a reading of 12V when V=IR and there is no current flowing in the circuit, can someone please explain? 12.1.2) I think I understand why the voltage is 0 and that is...

Consider the complete graph with 5 vertices, denoted by K5. E.) Does K5 contain Hamiltonian circuits? If yes, draw them. I know that a Hamiltonian circuit is a graph cycle through a graph that visits each node exactly once. However, the trivial graph on a single node is considered to possesses...

Consider the complete graph with 5 vertices, denoted by K5. D.) Does K5 contain Eulerian circuits? (why?) If yes, draw them. I know that Eulerian circuits are a circuit that uses every edge of a graph exactly once. These type of circuits starts and ends at the same vertex. If I find that the...

Homework Statement Can Kirchhoff's voltage and current laws, and Ohm's law, be used when analysing circuits with constant voltage and current sources, but also diodes? I'm trying to analyse such a circuit, and I'm finding that current is flowing backwards through one of the diodes...

Hi I heard great things about this forum and thought I would post one of my questions here. I am currently a second year Engineering student pursuing a degree in Electrical Engineering. So far I have not taken much engineering electives except for thermodynamics and a programming class. So far I...

1. Homework Statement For this problem, the diagram of the circuit is attached. It was assigned to find the frequency response function of the circuit.2. Homework Equations E_o/E_i= -Zf/Zi3. The Attempt at a Solution I know for the top branch of the circuit, it has a negative feedback loop...

Hello all, Long story short: I'm modding a Netbook PC; I'm powering three different sets of LEDs from three separate USB power sources. 1. How can I create one master power switch for all three circuits? 2. Would hooking all three circuits up to one switch in parallel burnout my USB ports...

Homework Statement Given that the diodes are ideal for the circuits a) and b), plot each of their output for the input shown. Label the most positive and most negative levels. Assume CR >> THomework Equations The Attempt at a Solution I am having a really hard time understanding the role of...

Electric Circuits and Gadgets -- Basics Please Well, when I lived in India, I remembered a neighbor whose occupation was creating little gadgets, such as watches, lasers, etc. I am now living in Pakistan, and missed the chance of asking the guy how he learned what he knew. I am curious to...

Homework Statement A simple type of blinking light circuit can be constructed using a neon lamp. The circuit has a 4.0uF capacitor in parallel with a neon lamp. When the voltage is low in the RC portion of the circuit, the lamp does not conduct electricity. Therefore, it is effectively not...

Homework Statement I have attached a pdf of the problem I am working on. The top circuit is the original problem; I am supposed to solve for the voltage drop across the 4-ohm resistor (top right). I HAVE to use the superposition theorem to solve this problem. The 4 circuits drawn below...

ThIS IS NOT A HOMEWORK! I need to know the difference which is why i used simple setups to help ask a question. This helps me in doing more complicated circuits after understanding where a potential drop occurs and when it doesnt

Homework Statement For the above circuit, find the coefficients of the linear relationship vout = a1vs1 + a2is2 + a3is3 by superposition. Then find the power delivered to R3 when vs1 = 100 V, is2 = 2 A, and is3 = 4 A. Given: R1 = 20 Ω, R2 = 60 Ω, and R3 = 20 Ω. Homework Equations...

Hi, Can anyone take a look at this article and tell me your opinion? I want to know if this is true or not before learning it? http://science.uniserve.edu.au/school/curric/stage6/phys/stw2002/sefton.pdf

I didn't understand the algorithm explained in my textbook. ("Introduction to combinatorics" P.165) I would an alternative explanation with an example. Here is the algorithm: (i) from a new vertex, any edge may be taken; (ii) from an old vertex, if the edge just traversed was nes, then turn...

I was reading my physics textbook which says that a current carrying wire has no net charge and thus no electric field because the electrons cancel the protons in the atoms of the wire. Would there not be an electric field created by the battery as you have a positive and a negative terminal? As...

Homework Statement Find the current through R1 and R2 if R1 is 15 and R2 is 12.7 Homework Equations The Attempt at a Solution I have no idea how to start or complete this question. Everything that I do ends up wrong. Can anyone help me out here?

Hi guys! So I've just recently started learning about phase relationships for inductors and capacitors in an AC circuit. But a few things keep bugging me: Say we have a RL circuit (a resistor + inductor + voltage source all in SERIES), and we we're asked to draw a phasor diagram for the...

Homework Statement Why is it when referring to the power delivered through a circuit the value is negative, and the power absorbed would be positive? Logically it doesn't make sense to me that negative power value is being delivered through out the circuit. Thanks Higgenz...

Homework Statement A battery with an emf of 60 V and an internal resistance (r) is connected to a 10 ohm external resistance. The power lost inside the battery is 50w. The same battery is then connected to a 4.0 ohm resistance. The power loss is 200w. What is the internal resistance of the...

Hi everyone, I want to understand how to decide what type of regulator I need to use in a circuit. I believe it will take much time to learn it totally but as a first step I am going to ask the differences between two regulator circuits. A circuit and the 5V regulator it uses can be seen...

1. What current flows through the 11.0 Ω resistor? a) 0.21 A b) 0.27 A c) 0.93 A d) 1.2 A To summarize: V1 = 8.0 V V2 = 5.0 V R1 = 2.0 Ω R2 = 11.0 Ω R2 = 1.0 Ω I know we shouldn't attach pictures, but the diagram does make the question a lot easier to understand. Homework...

1. A series circuit initially consists of a cell of unknown voltage, a resistor R2 of 4.0 Ω, and another resistor R2 of 6.0 Ω. A student measures the current through R2 to be 3.0 A. When a wrench that has a small resistance is dropped on the circuit, the current through R2 is reduced to 1.0 A...

Are the two circuits attached the same? "Circuit diagram" is the original schematic file, and "circuit" is the one I tried creating online. Are they the same? I am doubtful of the overlapping of the wires and also the power sources. Thanks so much!

Can anyone recommend a circuits book? And I have never taken a circuits class. The textbook that my school is reading from is Basic Engineering Circuit Analysis by J. David Irwin. https://www.amazon.com/dp/B005FHLIP4/?tag=pfamazon01-20 However the book did not get good reviews so I want...

Hey everyone, I'm currently working through some physics questions considering physics and became really stuck over a few questions therein. 1: If you have a circuit (See file 1) where the ammeter reads 3.20 then what will the voltmeter read? 2: If you have a circuit (See file 2)...

Homework Statement Determine the currents I_1,I_2,I_3 given the information below. Note that the directions of the currents are drawn by myself. All other info was given at start. http://i.imgur.com/Pw2KK3O.jpg Homework Equations Kirchoffs law The Attempt at a Solution...

Hi, I'm just starting to study circuits, and there's a thing I don't understand about electric potential. I was under the impression that as a charge moves through the circuit from the high potential end of the battery to the low potential end, it lost electric potential energy which...

I am starting to learn about transformers, and know the basics: they use electromagnetic induction to induce a current in a secondary coil, and the voltage and amperage of that second coil are dependant on the voltage and amperage of the first coil, and the ratio of turns in each coil. So...