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Help Wanted:
1. Mistake correction
2. Drawing illustrations in vector
“Constants aren’t and variables won’t” from Murphy’s Laws and Other Reasons Why Things Go Wrong, by Arthur Block
In this chapter well take a look at what “limits” mean for all the “3-P” laws and models that well study in this book.
The study of electricity isn’t all that complicated Really, I’m serious. All you have to remember is that everything is variable and nothing is linear.
“What a minute!” I can hear you say, “How can I study something that’s always changing?”
Here nature is kind. Within the limits of the questions we’re asking here, things are constant and linear enough that you can apply a few simple laws and formulas to get very accurate results.
What does “accurate results” mean? This means that if you calculate that a voltage across a conductor is supposed to be a certain value, then if you actually measure the voltage on the real conductor, it will be the same. The trick is to come up with a convenient model of the actual physical system to which you can apply the laws and come up with accurate results. But remember, the model is not the real system. It is just a convenient way of looking at things so that you can do some work with it. This is the key to understanding.
A “model” is an approximation you set up in your head or on paper so that you can calculate the outcome of your electricity play without actually doing it.An example: copper wire for all intents and purposes is considered a linear material. If you double the voltage across it the current will double – generally. This means that the resistance of the conductor is constant. Right?
Enter temperature, stage left. The resistance of a conductor varies with temperature. For instance, a copper wire at 150°F has 28% more resistance than the same wire at 32°F. For a limited range of temperature (about several hundred degrees Fahrenheit) these temperature effects are linear.
Now comes the kicker. As current flows through a conductor, the resistance of that conductor to that current makes the wire heat up, i.e., raise its temperature. This is a process known as power loss.
Sack to the wire which is heating up. The temperature that the wire reaches depends on many factors. This temperature limit, by the way, is how the National Electrical Code determines the current limit for various size wires. The temperature reaches a plateau; the level of the plateau depends largely on the type of conductor, where it is, and on the current At this new higher temperature the conductor has a higher resistance than when you first start putting current through it.
Molly was a modem, emancipated woman of 1900. Unlike her Victorian-minded female relatives, she appreciated these new, modern inventions. She wore bloomers when she bicycled in the park. Heck, she even smoked – in secret of course.
All of these things swirled dizzyingly in Molly’s mind as her naked body struggled against the heavy, restraining straps in this stoutly constructed wooden chair. But she was helpless. They were too strong for her.
In an effort to regain her now rapidly diminishing composure, she tried to recount the events that led her to being in this vulnerable position and… with a wet pussy.
It was the Professor. He was lecturing in town on “Electricity is Life.” She attended with some of her friends, and she was especially impressed with the Professor – his knowledge, his dedication to the human body, the bulge in his pants. She readily accepted the Professors invitation after the lecture to privately experience the “healing powers of electricity”.
Once in his traveling surgery she responded quickly to the order to “strip!” Now she was in her helpless position in this dim, candle lit room, having been secured thus by the Professor’s strong will as well as his powerful hands.
Molly detected movement in the shadows, it was the Professor He was wearing a black leather outfit His hands fondled her body. Her pussy was getting wetter by the minute.
She heard the hissing crackle of an electrical device and saw a glowing gas tube in the Professor’s hand. The violet glow cast a demonic and exciting fight on the Professor’s leathers. She struggled even more, hut to no avail.
The glowing tube felt like ants crawling over her skin as it got closer, finally sparks jumped to her hare arm. She tried to pull away but couldn’t. All she could do was helplessly experience the tingling sparks on her skin. She was terrified – but, undeniably, excited. Despite her weak protestations and encouraged by her low moans, the Professor continued.
The cruel instrument was run across her breasts, her arms, her chest, her belly and… oh no… he was moving it slowly down to her pussy.
Molly arched her body and let out a long, deep, almost gargling exhale as the sparks danced across her clit.
In the temporary respite the Professor, in the process of running his hands across her fingers, asked “And what are the code words. Molly?”
“Red, Yellow, and Green, Professor,” she was able to answer.
Molly knew that Tom was checking in with her without breaking the energy of the scene. She appreciated his skill and loved torn for that. That’s why she did electrical play with him for years.
Molly and Tom, the Professor, continued on with their scene for about another half hour before spending the rest of the night in bed cuddling and fucking and loving each other.
“OK,” you say t “temperature can make the resistance of a conductor non-linear but at least it comes to rest for a given conductor and current.” This is true, and these temperature/current points are predictable by long equations which we don’t need to go into here. But lower the temperature of the conductor below a certain temperature, and all of a sudden the conductor has zero resistance (or damn near zero). We say the conductor is now a superconductor – a thing that modern scientists and engineers get all excited about (imagine batteries that last forever!).
The purpose of this little digression is to show you that when you have a picture in your mind – a model – about some electrical phenomenon, you have to know what the limits of this model are. In this case Ohm’s Law works gives really great answers when E, I and R don’t vary. (It also works when they vary, but it becomes a lot more complicated to figure out – kind of like herding cats.)
Now we kinky folks know a thing or two about limits – or at least we should. Limits guide our play and make it safe. “No whipping on the tailbone” and “the bottom doesn’t want any bruises… tonight” are limits that are familiar to us.
Also with other complex things you’re good at, you know that the models you have in your head have limits. In doing a bathroom remodeling job, for example, you know that gold faucets would look damn nice, but they’d be too expensive. Brass might look just as good, the costs are right, but there’s a cleaning problem. You get the idea.
Understanding the limits of the models helps you understand what you’re working with. It can also help you be more creative in design and play. You can also fit the right model to the situation – like using “current” for thinking about wires and “current density” for thinking about body parts. Understanding the models and their limits helps make you a safer player.
Models work pretty well – except when they don’t. Part of what you can learn from this book is how to set up good models, yet understand their limitations.Now you can forget about temperature effects on a conductor and superconductors – I just used them as an example of how limits can change according to circumstances. We won’t need these to understand electrical play (unless you’re a cute blond masochist; then there’ll be a difficult test with severe punishments – when you fail).