# What is Ciruit: Definition and 20 Discussions

The ITF Women's World Tennis Tour, previously known as the ITF Women's Circuit, is a series of professional tennis tournaments run by the International Tennis Federation for female professional tennis players.

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1. ### Engineering Finding the constraint equation of a circuit with a dependent voltage

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...
2. ### How Can I Broadcast a Message Into Outer Space Using Radio Waves?

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...
3. ### Discussing primary resistance of a double-tuned ciruit

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...
4. ### Engineering Converting to a circuit's Thevenin equivalent?

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...
5. ### RMS Current through RLC combination ciruit

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...
6. ### Total Work done on a Capacitor

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...
7. ### Engineering How do I find the current in this circuit?

< 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 :)
8. ### Solving Capacitive Circuit: Why is 8.35V Wrong?

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...
9. ### Polarization Hysteresis Ciruit

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
10. ### Maximum Charge on a Capacitor in an LC Ciruit

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...
11. ### Equivalent Resistance of a Ciruit

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...
12. ### How to design a ciruit that has 2 LED Lights

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...
13. ### Equivalent Resistance of a Ciruit

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...
14. ### How do we find the equivalent voltage in a parallel circuit?

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...
15. ### Conducting rail ciruit, against gravity

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...
16. ### (help optimize ciruit) 555 burst

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...
17. ### Solving for the Voltages and Currents in a (simple?) Ciruit

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...
18. ### How Do You Calculate Voltage, Power, and Current in a Combination Circuit?

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...
19. ### Electronics - Designing a ciruit

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...
20. ### A.C. Ciruit without current flowing

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...