{"id":55591,"date":"2025-11-08T05:38:50","date_gmt":"2025-11-07T20:38:50","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=55591"},"modified":"2026-09-20T04:53:51","modified_gmt":"2026-09-19T19:53:51","slug":"the-10x-secret-how-the-pascal-cable-turns-a-safe-5-amps-into-mind-blowing-electromagnetism","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=55591&lang=en","title":{"rendered":"One Wire, Ten Times the Power!? Feel a “30-Amp” Magnetic Field with the Pascal Cable (S-Cable)"},"content":{"rendered":"

I\u2019m Ken Kuwako, a science trainer. Every day is an experiment.<\/strong><\/span><\/p>\n

\u201cElectricity\u201d and \u201cmagnetism.\u201d Do you remember learning about the \u201cright-hand screw rule\u201d and \u201cFleming\u2019s left-hand rule\u201d in school science?<\/p>\n

They\u2019re familiar concepts from textbooks, but when you actually try the experiments, the compass needle may only twitch \u201ca little,\u201d or a wire may move \u201cever so slightly.\u201d Honestly, it can be hard to experience the kind of dramatic effect that makes you say, \u201cWow!\u201d The reason is simple: the forces involved in electricity and magnetism can be surprisingly delicate and weak.<\/p>\n

But what if you could safely experience an electromagnetic phenomenon with the kind of \u201cwow factor\u201d you would expect from a current of tens of amperes<\/strong><\/strong>, while still using a safe school laboratory power supply capable of only a few amperes? Today, I\u2019d like to introduce an amazing piece of experimental equipment called the \u201cPascal Wire\u201d and reveal the secret behind its astonishing \u201c10\u00d7 power\u201d!<\/p>\n

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The Dilemma of Electromagnetism Experiments<\/h3>\n

The fact that electricity can produce magnetism, as discovered by Oersted, and that a current experiences a force in a magnetic field, as described by Fleming\u2019s law, are fundamental principles behind modern motors and generators.<\/p>\n

However, to make these forces clearly visible in an experiment, you would normally need a current of \u201ctens of amperes\u201d\u2014enough to trip an ordinary household circuit breaker. In school laboratories, the available current is usually limited to around 5 amperes at most. That simply isn\u2019t enough for the effects to be easy to see.<\/p>\n

The \u201cPascal Wire\u201d solves this long-standing dilemma with a surprisingly clever idea.<\/p>\n

The \u201cPascal Wire (S-cable)\u201d is the world\u2019s only experimental teaching device that allows anyone to easily, safely, and affordably experience at hand all kinds of electromagnetic phenomena, beginning with Oersted\u2019s great discovery.<\/p>\n

From the official Pascal Wire website<\/a><\/p><\/blockquote>\n

The Secret Is \u201c10 Wires\u201d! How It Safely Creates 10\u00d7 the Effect<\/h3>\n

With the Pascal Wire, for example, you can create a magnetic field as powerful as one produced by a \u201c50-ampere\u201d current simply by running 5 amperes from a laboratory power supply.<\/p>\n

You might be thinking, \u201cWait, isn\u2019t 50 amperes dangerous?\u201d But here\u2019s the key: it\u2019s only like having<\/strong><\/strong> 50 amperes flowing. The actual current flowing through the equipment remains just 5 amperes. That\u2019s what makes it so safe. \u201cI have no idea what you\u2019re talking about!\u201d Right? (Haha.)<\/p>\n

The secret lies in the construction of the wire. The Pascal Wire looks like a single thick cable, but inside it are actually 10 separate thin wires<\/strong><\/strong>.<\/p>\n

I immediately ordered some online and bought the cable needed to make one. Suitable cable for making a Pascal Wire includes Fujikura Densen VCTF 0.3sq \u00d7 10-core<\/a>, which is available on Amazon.<\/p>\n

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Fujikura Densen VCTF 0.3sq \u00d7 10-core Vinyl Cabtire Cord (Round Cable)<\/a><\/p>\n

Inside are 10 separate wires like these. They are soldered together in different combinations according to their colors.<\/p>\n

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These 10 wires are carefully connected by soldering so that \u201cthe current entering from (+) travels through the 10 wires in parallel (!) and exits through (\u2212).\u201d \u203bA single conductor is connected in series so that it makes 10 back-and-forth passes. The key idea is to \u201ccombine the effects of all 10 wires.\u201d<\/p>\n

(\u203bUpdate: For the exact internal structure, please check the official website. The important point is that current flows through all 10 conductors, causing the magnetic fields produced by each conductor to \u201cadd together\u201d!)<\/p>\n

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And this is what it looks like when finished.<\/p>\n

If we call the magnetic field produced by a 3-ampere current in a single wire \u201c1,\u201d the Pascal Wire creates essentially the same effect as having 3 amperes flowing through each of 10 wires\u2014all inside a single thick cable.<\/p>\n

That means the magnetic field (and the force produced) is simply 10 times stronger!<\/strong><\/strong> Instead of relying on the brute force of an enormous current, this clever idea combines the effects of 10 wires to create experiments that are both safe and impressively powerful.<\/p>\n

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Let\u2019s stack two power supplies and try running a larger current. The effect becomes 10 times stronger again. As an example, you can use the following link as a reference for an experiment demonstrating the right-hand screw rule.<\/p>\n

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It\u2019s fun to watch the compass needle suddenly twitch!<\/p>\n

\u30d1\u30b9\u30ab\u30eb\u96fb\u7dda\u3067\u78c1\u5834\u3092\u300c\u898b\u308b\u300d\uff01\u96fb\u6d41\u304c\u751f\u307f\u51fa\u3059\u898b\u3048\u306a\u3044\u529b\u306e\u6b63\u4f53<\/a><\/p><\/blockquote>\n