# Tagged Questions

Kirchhoff's circuit laws deal with the conservation of charge and energy in a circuit.

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### Not sure how to find current

Here's a circuit: As you see there's a dependant source, 0.01Vx, depending on Vx, the voltage at the resistor of 150 ohm. I don't exactly know how to handle this circuit properly. The presence of ...
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### What are the exact conditions, in terms of graph structure, where KVL can be applied?

This might be a really dumb question, but ... My understanding of KVL (Kirchoff Voltage Law) is that when you sum all voltages around a circuit "loop", then the sum is zero. Fair enough, but in ...
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### KCL Current Law calculations

I hope you can help in relation to my KCL question which asks that I find the currents in i1, i2, i3 and is. I'll also need to calculate the power dissipated by the resistors in the circuit and ...
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### Learning loops, Kirchhoff's Laws

I'm trying to teach myself electronics from an old textbook, "Fundamentals of Electric Circuits", $4$th Edition, by Alexander and Sadiku. On page $41$, I can't figure out how they did example ...
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### Current flow in a series circuit with two voltage sources

I specifically want to know how does the current flow in the schematic attached. There are two voltage sources (one dependent, the other independent) in the figure. Correct me if I'm wrong, but it ...
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### Problem modelling NPN transistor BE junction in LTSpice

So, I am trying to understand transistors. I start with the very basics, the part which says that an NPN transistor kinda look like two diodes joined at the hip (at the anode, in fact) I build the ...
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### KCL for this Supernode

I have an exercise (and merely an exercise) from my engineering Circuits class. Either way, the example they wrote up for a supernode makes perfect sense, but the solution to the exercise does not. ...
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### How do I simplify this circuit to find resistor voltage?

In my circuits class, I am presented with the following exercise. simulate this circuit – Schematic created using CircuitLab The problem is to find the voltage across resistors A and B. ...
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### No voltage across this component?

There is a Problem in our textbook which asks us to find, using Kirchoff's law, the voltage across component v_x and v_y. According I know that the voltage at node 1 should be 14 volts from [21 + ...
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### Finding current using Kirchoff Law, but getting unsolvable system

Hello, the original circuit above is where I am trying to find I1, and I simplify it the figure below and assuming the following current directions. Using ...
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### Application of Ohm's law / Conservation of Energy

I am taking my first Engineering Electronics class, Engineering Circuits I. I seem to be understanding it, but this one example confuses me somewhat. The simplest manifestation of Ohm's Law (...
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### KVL equivalent versions

How do the first two statements (quoted below) logically correct when the third is viewed as voltage drops are only across resistors and the voltage rises are only across voltage sources? Where is the ...
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### Nodal Analysis of a Circuit

I'm trying to apply Nodal Analysis here.I have found that taking reference Nodes and application of Kirchhoff's laws yields some equations and on solving these equations i will get the needed ...
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### Superposition theorem

I'm trying to apply the superposition theorem. I'm confused how the value of $I_2$ is calculated, from where does the value of 1 come?
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### Solving this circuit using node analysis

Hi I'm having a really bad time in analyzing this I can't seem to establish the node equations, I've been reading on articles on how to solve it but the majority use current sources and the methods ...
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### How does the current know how much to flow, before having seen the resistor?

With the following circuits as examples : and How will the current I know how much to flow? Would any other wave travel first in the circuit and then come ...
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### Basics of Transistors

something has been bothering me for awhile. When I look at a circuit involving anything more complicated than RLC components (and perhaps op-amps) I struggle to figure out what it's doing unless its a ...
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### Explain kirchoff's law in Plain English

I'm having trouble in explaining kirchoff's laws to my cousin who is studying in first year Engineering. Can somebody explain me in simple plain english. Thank you very much in advance :)