What Is the Magnetic Constant and Why Does It Matter?

This means that these three values ​​cannot be independent; If you know two of them you can achieve the third one. How do physicists deal with it? We define the speed of light as exactly 299,792,458 meters per second. (How do we know this right? Because we define a meter because the light of the distance is traveling at 1/299,792,458 in one second)) We measure the magnetic constant (M₀) And use that value with the speed of light to calculate the electrical constant (E₀)

Perhaps it seems like cheating but even to start the real science, at one point we need to create a voluntary unit and define some parameters. In fact, when you come down it is made like all the words, just as all the words are made.

Free space

Magnetic fields (represented by symbols) B) Can be made by magnetic, as shown on top of photos up. However, because of the inter -reliance we have talked about, they can also be done with electrical charges. (I am using the shorthand word “charge” for the charged particles like electrons) it has been described by the Biot-Sart Act:

You can see the magnetic constant (M₀) There. We also have the value of electric charges (Question) Running with a specified velocity (v) Thus it says that the magnetic field with electronic charge grows and decreases with distance (More) From the ongoing charges – and the magnetic constant tells us exactly how much it changes us.

Of course, we do not deal with the individual running electrons very often. But we always work with the streams of running electrons: this is electronic current, which we can measure. If we know the charge of the particles of the Coolombs, the number of kulombs flowing every second gives us the present (I) Ampresees. And we can write the above equation from the current direction: B = m₀I/(2πr).

It is everywhere

It is what we say to us By generating a magnetic field of electric currentThe It is used in all types of machines. For example, it gives us electronic magnetic, where metallic objects can be turned on and off to move to factories and scrapiards. This is how audio speakers make words: an electrical signal vibrates a magnetic driver, which produces pressure waves in the air.

Also Magnetic fields affect electric currentsThe This is how the motors work. In the presence of the magnetic field, there is a current running with the cable coil that is usually made with some permanent magnetic. The energy on the wire coil turns it to turn it and you have a motor. It can be any fan motor, part of your AC briefer or the original drive of the electric vehicle.

Wait! There is more. By creating a magnetic field such as the changed electrical field, If a variable is an electrical field of magnetic field– And it produces an electric flow. This is how most of our energy is generated. Source of some energy – steam, air, running water, whatever – spreads a turbine that rotates a coil in the magnetic field. The changed magnetic flow is induced a voltage in the coil, converting the mechanical energy into electrical energy that can cause infection in your home.

Magnetic constant measure

How can we measure M₀? A method that uses the current balance. It contains two parallel to carrying electronic flow in a common version of it (I) In the opposite direction, as shown in the image below. Then you suspend with two cable strings so they can move separately:

Each cable currents creates a magnetic field in another wire location and it separates them. As they moved, magnetic energy decreases and the horizontal component of excitement in the support string increases (due to changes in the corner). If these two forces are equal, the cables will be “balanced”.

If you know the distance between the electric currents and the distance between the wire (More), You can determine the magnetic constant, M₀The Then, as we have shown above, you can use this value with the defined speed of light to calculate the electric constant, E₀The

Yes, in all you can say that the magnetic constant is quite important. Oh, and what is that constant value? According to the International Committee for Weight and Management, M₀ = 1.256637061272 × 10^-6 N/A²The No more, not less.