# Questions tagged [equivalent-circuit]

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### Why is the current source in the harmonic model of a circuit with a non-linear load placed at this specific location in the circuit?

I'm studying the harmonic modeling of non-linear loads and came across a simplified schematic representing the non-linear load as a current source and an equivalent impedance (at a certain harmonic ...
• 53
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### Voltage Response of Equivalent 1-RC Model for a Lithium Ion Cell

Context: While studying Equivalent Circuit Modelling of Li-Ion cells, I came across a rough approach to approximate the model parameters. My source is this (Refer Book Page 39 in sample) The model is ...
87 views

### What is the essence of frequency in DC circuits?

While studying equivalent circuit models for lithium-ion battery packs, I came across the topic of Warburg Impedance. A paragraph from my source (Book Page 40 in preview) goes as follows: In the ...
810 views

### Finding equivalent resistance in a circuit in which 12 resistors are arranged in the edge of a cube

How we can find the answer in the simplest way between A and G without any advanced techniques. My Approach First, I noticed that there are twelve resistances arranged in the form of a cube, and I ...
63 views

### Why does photodiode junction capacitance affect operating bandwidth? (from a semiconductor physics model perspective)

Here is a typical equivalent circuit diagram of a photodiode. I feel like this circuit model broadly makes sense to me. You have a diode, in parallel with the junction capacitance. The photocurrent ...
28 views

### Equivalent inductance seen from a winding

I would be having a little trouble understanding how to do this problem of magnetic circuits. It asks me to calculate the equivalent inductance seen from winding N2. I know how to calculate the ...
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43 views

1 vote
78 views

### Which is the equivalent voltage and resistance values in this circuit with pull ups at different Vcc?

I have two PCB that i have to interconect. In the first one it is R1 (pull-up resistor) in the second one is R2 (pull-up). The yellow rectangle represents the interface between boards. My questions ...
1 vote
110 views

### How to convert Thévenin equivalent to Norton equivalent in this schematic?

I am learning the bus admittance matrix from Power System Analysis by Hadi Saadat electrical engineering. I have a very big problem in chapter 6.2 - Bus Admittance Matrix. At the beginning of chapter ...
95 views

### Equivalent electrical circuit changing and power balance calculation [closed]

I tried to change this circuit in three different ways, but the power balance is not the same. The least power balance that I got was ~50 W more and we need to find the balance between 0 and 5 W. ...
1 vote
244 views

### Find the equivalent resistance

I have to simplify the following circuit by using equivalent resistance. I know it probably should be very simple to do it, but for some reason, I can’t tell if the two resistors in the “internal” ...
• 115
374 views

### Equivalent impedance of a circuit

I'm trying to figure out the equivalent impedance of the right side of this circuit (so the capacity, inductance and right resistance) : I see this result in the solution of my exercice: But I don't ...
• 339
44 views

### Special cases in ideal source transformations for equivalent cirucits

I don't exactly understand what's meant by these transformations. Are we supposed to replace one of the sources with a resistor? What's the resistor's value supposed to be? I couldn't find sources ...
1 vote
115 views

### Do Grainger/Stevenson incorrectly describe an equivalent circuit for a transformer?

The equivalent circuit for a transformer, as shown above, is supposed to be consistent with the following equations: \begin{align} \small{\mathrm{Equation~2.22:}}~V_1&=(r_1+j\omega L_{11})I_{1} + (...
1 vote