What is Ciruit: Definition and 20 Discussions

What I’m stuck on is finding the constraint equation for i on the top question . I don’t know how to find it when it’s through a voltage source and not over any resistors. (I can’t use ohm‘s law) After I find i the problem should become easy to solve. I know that v1 = 10 and v2 = 20i . The KCL...

Hello! I have been thinking of broadcasting a message into outer space. It sounds silly, I know, but that's just something I'd like to do for and with my niece. She's 8 years old and very interested in physics (as far as she understands it). I have some knowledge in electronics, I think I...

Hi friends, My question... At non resonance frequencies the resistance of primary is minimum or maximum? My analysis... There are two tuned circuit tuned to same frequency . In primary circuit at low frequency XL is low and large amount of current will flow at the inductor L1, now due to this...

Homework Statement Homework Equations Finding the Thevenin equivalent? The Attempt at a Solution I found the thevenin resistance to be 185/47 ohms, which came out to be correct. I've been struggling with this question all day. I ended up attempting to find the norton equivalent and then...

Homework Statement Referencing the attached picture: a) Show that the RMS current in the 1 kΩ resistor is 6.5mA. b) If the AC voltage source was replaced by a battery, what would the current in the resistor be? Homework Equations V = IR Z = √(R^2 + X^2) The Attempt at a Solution To begin, I...

Homework Statement I am currently trying to work on the extra credit question, the capacitance of the capacitor is 2 microfarads Homework Equations W = 1/2CV^2 The Attempt at a Solution I've done the previous sections, and have gotten 4.23 * 10^-11 J as the answer for the work done on the...

< Moderator Note -- thread moved from the EE forum to the Homework Help forums > Please view the attached. The answers are: i1 0.1429 i2 0.4286 i3 0.2857 So how do I work this out? I assume you use kirchhoffs current law, can someone show me the step? Thanks :)

Reference to question 2 part (ii). I found out that: Qt =V x Ct Qt=50 x 1.67 x 10-6 Qt=83.5 x 10-6 I understand that in a series circuit for capacitor Qt=Q1=Q2=Q3 So if that's the case, looking at the circuit, since C2 and C3 are in series, their charge should be 83.5 x 10-6 since...

Hi all, I want to measure electric polarization hysteresis loop so i need the electric circuit to measure it. The circuit mostly contains a resistor and a capacitance, i need to what is the exact value of them ? Please tell me if there is a reference for that Thank you

Homework Statement A charged capacitor is connected to an ideal inductor to form an LC circuit with a frequency of oscillation f = 1.6 Hz. At time t = 0 the capacitor is fully charged. At a given instant later the charge on the capacitor is measured to be 3.0 μC and the current in the circuit...

Homework Statement Find the equivalent resistance of the circuit as shown in the diagram below; where, R1 = 2 Ω, R2 = 1 Ω, R3 = 2 Ω, R4 = 1 Ω, R5 = 4 Ω, R6 = 4 Ω, and R7 = 4 Ω. http://i.imgur.com/OsAs2.gif Homework Equations The Attempt at a Solution R3 and R4 are in parallel...

How to design a ciruit that has 2 LED Lights ... I want to design a circuit for the sake of me seing if i can do it. I need the following things 2 LED Lights which are flashing on and off and make noise relative to when there on or off ( like a police siren ) and also i need to house all of...

1. Find the equivalent resistance of the circuit as shown in the diagram below; where R1 = 1 Ω, R2 = 2 Ω, R3 = 2 Ω, R4 = 4 Ω, R5 = 1 Ω, R6 = 1 Ω, and R7 = 2 Ω. http://img21.imageshack.us/i/prob06v2.gif/ http://img21.imageshack.us/i/prob06v2.gif/Homework Equations R(parallel) 1/R(total) = 1/R1...

Homework Statement [PLAIN]http://img600.imageshack.us/img600/7497/prob2.jpg Homework Equations I = V / R The Attempt at a Solution I tried to add the 3 voltages together but i didn't get a correct answer .. I guess I'm missing something that has to be with the parallel Circuit...

Homework Statement So my textbook has a lot of example of conducting rails moving horizontally with unknown variables of F and B, but how would you approach a problem that has such a device pointed vertically with the moving bar droping? let's say R and B are known and we need to find...

Hi all I'm building a circuit that will interconnect with my airsoftgun to provide 3 round burst capabilities. Basically it flips a relay for a set amount of time based on the value set by a pot. This closes the circuit that would normally be full auto, but for a set amount of time. I have...

Homework Statement For the three (simple?) circuits, I'm asked to solve for the voltages at A and B, and also the current I. For figure 1, I assume that is just a simple voltage divider, with the voltage at A to be 5*(1/21) correct? I'm a little more confused with the circuit in figure...

here is the new diagram of combination...The voltage is 120 and its asking me to find total voltage, resistance, power and current. The resistance is given, its all 3 its asking for voltage, power and current for each bulb///please help me...thanks a looot and the picture for this problem is...

Homework Statement Given an ideal power supply of 15 V and a load of 5 kilo ohms, design a circuit using 2 resistors in which the current flowing through the load is close to 2mA Homework Equations None given (I'm assuming V=IR) The Attempt at a Solution I'm a bit confused...

hi there, In a.c. circuit, avery half circle, the current changes it direction. If u increase it, the changing rate is faster. So, this come to my mind, can u stop teh current from flowing by using very very very high frequency? That is the changing of direction of flow of electron is too rapid...