# Tag Info

Accepted

### What is the voltage drop across the 10 ohm resistor?

Millman's theorem is a kind of multi source voltage divider theorem based on this topology: - So, re-arrange your circuit to use a 3rd source that is actually 0 volts and you're good to go: - Hence \...
• 464k

### What is the voltage drop across the 10 ohm resistor?

Two voltage sources are contributing towards the voltage drop across V1. So the equation $V_1 = (20 .10)/(10+4)$ is not correct. You ignored the 10V Source, and the 10 ohm-5 ohm resistor network in ...
• 11k
Accepted

### Simple circuit, mesh method, can't resolve

Your schematic and the current directions I chose to take in my own head: simulate this circuit – Schematic created using CircuitLab I get the same equations you do. My work is on the left, ...
• 78.3k

### What is the voltage drop across the 10 ohm resistor?

You can solve this with either mesh or node analysis. Here's my take on the problem using mesh analysis: Letâ€™s call the left mesh Mesh I and the mesh on the right, Mesh II. There is a current i1 ...
Accepted

### RC Circuit Analysis Direction Changes Formula

The basic constitutive equation for a capacitor is based on these assumed polarities, The equation being, $$i(t)=C\frac{dv}{dt}$$ If you want to define your current as leaving the capacitor then you ...
• 3,497
Accepted

• 78.3k

### What is an electrical node?

In electrical systems, a voltage node is a region where the voltage is the same throughout the region. A current node, is also a voltage node, where current branches combine or merge. There can be ...
• 16.7k

### Why is the current flowing this way in these 2 meshes in a simple circuit?

The currents do not necessarily flow in directions as depicted. The positive flow direction is set for sake of notation and you do the calculations based on the equations and the selected direction of ...
• 157k
Accepted

### Incorrect current assumed in Hayt Ex 5.3

The relationship between the dependent voltage source and the current must be maintained. If you swap the arrow direction for the current $i_x$ you also have to swap the sign on the dependent ...
• 406k

### How many meshes are in this circuit?

This is likely drawn improperly. Or it's intended to trick you. For example, the 80k resistor reduces to a short circuit. As does the 2A source. But you could argue the short that it forms with itself ...
• 4,830
Accepted

### Why does each mesh equation give different I3 value? What's the correct value and final answer?

You have three loops showing. (There are other loop arrangements that could be used to replace any of those three, just FYI.) Two of the loop currents are known because there are current sources that ...
• 11k

### Using mesh analysis to get the transfer function of electrical system

To determine transfer functions in a swift and efficient manner, the fast analytical circuits techniques or FACTs are an invaluable tool to learn. The basic principle is to determine the time ...
• 22.7k
But as I remember, the both currents I1 and I2 are in the same directions, so it should + instead of - ? If you look at the total current through the inductor, then you see that $I_1(s)$ goes from ...