# Questions tagged [electric-circuits]

An electronic system, with closed loop current flow, and relative electrical potentials present across electrical components.

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### What is electromotive force? What's its relationship to Voltage? + clarification of confusion

So first of all, yeah I know that the electromotive force is not a force (the name was coined by Alessandro Volta I think). About Power and dissipated power The power with wich a battery provides the ...
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### Why does this RLC behavior differ from what equations predict?

In order to better understand RLC behavior under current sources, I constructed the simple circuit below and attempted to analyze it. However, my equations do not agree with simulation results. The ...
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### What are the limitations of Nodal Analysis?

Yea, that's the question basically. What are the limitations of Nodal Analysis? Like, for example take the following case, we have to find out the net capacitance between A and B. Now I want to solve ...
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### Is it safe to assume it to be a balanced Wheatstone bridge?

If we calculate the potential at both ends of these $3\,\Omega$ and $4\,\Omega$ resistors, that comes out to be the same. It is $V/3$ at both ends of the $3\,\Omega$ resistor and $2V/3$ at both ends ...
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### A-Level physics question: gradient of graph of voltage [closed]

I am trying to do question 25(b) from this A-Level physics paper: (page 20/28) https://ocr.org.uk/Images/677416-question-paper-breadth-in-physics.pdf According to the mark scheme, the graph should be ...
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### Current equation for a circuit containing 5 basic elements in series

Does a general equation (for current) exist for a circuit containing the five elements namely e(dc), e(ac), R, L (active/inactive), C (charged/uncharged) in series? If yes, can i derive from it the ...
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### Current sensitivity in transformer scheme with SQUID

I've tried to determine the maximum current sensitivity in this transformer scheme but I'm not sure if my solution is valid. I need to find the relation between the current in the input transformer ...
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### How to find current direction from voltage value?

+2024.06.04. editted I'm adding an example image of the data I have. My circuit is a raster(matrix) format, and each cell (entry) is a node of the circuit. In the example, 1A is injected into the ...
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I have understood the later parts of the model answer, but why does the current increase? I know that the brightness of a lamp is determined by its power which is given by $P=IV$. Since the current ...