What is Complex circuits: Definition and 13 Discussions

An electrical network is an interconnection of electrical components (e.g., batteries, resistors, inductors, capacitors, switches, transistors) or a model of such an interconnection, consisting of electrical elements (e.g., voltage sources, current sources, resistances, inductances, capacitances). An electrical circuit is a network consisting of a closed loop, giving a return path for the current. Linear electrical networks, a special type consisting only of sources (voltage or current), linear lumped elements (resistors, capacitors, inductors), and linear distributed elements (transmission lines), have the property that signals are linearly superimposable. They are thus more easily analyzed, using powerful frequency domain methods such as Laplace transforms, to determine DC response, AC response, and transient response.
A resistive circuit is a circuit containing only resistors and ideal current and voltage sources. Analysis of resistive circuits is less complicated than analysis of circuits containing capacitors and inductors. If the sources are constant (DC) sources, the result is a DC circuit. The effective resistance and current distribution properties of arbitrary resistor networks can be modeled in terms of their graph measures and geometrical properties.A network that contains active electronic components is known as an electronic circuit. Such networks are generally nonlinear and require more complex design and analysis tools.

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  1. P

    Understanding Voltage Distribution in AC Circuits

    The problem is shown below: (I am only asking about part b) ^Above is the problem. Below is the solution to part b. They have claimed that we can set potential at C = D = u(t), and A=B=0. Why is this claim true? What I realize: By applying Kirchoff's across ACDB, Voltage across C1 = Voltage...
  2. e0ne199

    Engineering Problems about Zin in complex circuit analysis

    1. Homework Statement the problem is my answer for question (a) is not the same as the answer provided by the question, i get 2.81 - j4.49 Ω while the answer demands 2.81 + j4.49 Ω Homework Equations simplifying the circuit, details can be seen below The Attempt at a Solution...
  3. P

    Find currents I1 and I2 in a 3-loop, 2-battery circuit

    Homework Statement Find currents I1 and I2 in the following circuit: Homework Equations I know I have to use Kirchoff's loop rule but I am not sure of the current going through the 5 ohm and 8 ohm resistors, is it just I1 and I2 respectively? Also do I incorporate the large loop at the...
  4. kamhogo

    Equivalent resistance between a and b -- Complex circuit

    Homework Statement Homework Equations Req = [ ( 1 / R1) + ( 1 / R2) +. ...]^-1 (Parallel) Req = R1 + R2 +. . . (Series ) The Attempt at a Solution I tried to simplify the circuit by spreading it out but I guess something is wrong with my simplification since I can't arrive at the correct...
  5. K

    How to determine the sign of currents in complex circuits?

    Homework Statement A combination circuit powered by a 6.0 V battery is shown. What is the total current through this circuit? I don't know how to determine where the signs go, for example if the right side of a resistor is positive or the left side is positive Homework Equations What is the...
  6. Sneakatone

    Complex Circuits Lab Homework: Find Parallel Resistor

    Homework Statement uploaded is the circuit with resistors technically in series. R1 had a measured value of 160 ohms (from A to B) 0.0617 Amps R2 had a measured value of 387 ohms (from B to C) 0.025 amps from A to C the resistance measured is 243.9 ohms 0.041 amps this means that there is a...
  7. T

    Technique to analyze complex circuits?

    I would like to what is the best way to analyze complex circuit with resistors in series and parallel. I have attached a sample circuit. You can also show it to me with other circuits. Thanks
  8. A

    Detecting if resistances are parallel or series in complex circuits

    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...
  9. S

    Complex circuits with Kirchoff's law

    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
  10. C

    Potential difference on complex circuits

    ****WARNING-THIS IS NOT A HOMEWORK-WARNING**** Hello dear Physics Forums users, I have no idea about how to find the potential difference between two points in a complex circuit. I m not even sure if I really know how to find it in a basic circuit. Please help me and enlighten me with your...
  11. P

    Solving Complex Circuits: Need Help With Current Direction

    Homework Statement Refer Attachment Homework Equations The Attempt at a Solution I have drawn the current direction in green. Are there any rules regarding the direction of the current? I am at a bit of a loss regarding the horizontal current through the middle. The best I could...
  12. A

    Solving Complex Circuits - Voltage & Current w/ Resistance

    Homework Statement R=resistor determine the voltage across and the current through each resistor for the circuit. The Attempt at a Solution 1&2=parallel 1/50+1/25=3/50 --> 50/3=16.7 ohms 3&4=parallel 1/10+1/10=1/5 --> 5 ohms 5&6=series 5+10=15 ohms total resistance=36.7...
  13. S

    Finding Currents in Complex Circuits - E1= 10V, E2= 6V

    Homework Statement I have to find the current through each resistor in this: http://i7.photobucket.com/albums/y297/SpaceTrekkie/Physics/Untitled.jpg circuit. All the resistors labeled R1 are 100ohms, the one labeled R2 is 1000 ohms and E1 = 10V E2= 6 The Attempt at a Solution I...