What is a magnetic constant and why is it important?
This means that these three values cannot be independent. If you know two of them, you can extract the third. How do physicists deal with this? We define the speed of light exactly 299,792,458 m. (How do we know accurately? Because we define one meter as a distance light in 1/299,792,458 seconds.) Then measure the magnetic constant (μ0) And use that amount with light speed to calculate electric electricity (ε0).
It may seem like fraud, but even to start the real job, sometimes we have to form the desired units and define the parameters. In fact, when you get it, all measurement systems are made, just like all words.
Free space permeability
Magnetic fields (shown by the symbol Description) As shown at the top of the photo, it can be created by magnets. But because of the interdependence we talked about, they can also be done by moving electrical costs. (I use the term “charging” for charged particles such as electrons.) This is described by the Biot-Savart law:
Can see the magnetic constant (μ0) There we also have the amount of electric charge (Saadi) Move with a particular speed (Word). So this says the magnetic field increases with an electric charge and decreases by distance (Letter) From the moving and magnetic fixed charging, it tells us exactly how different it is.
Of course, we often do not deal with individual moving electrons. But we always deal with the flow of moving electrons: this is an electric current that we can measure. If we know the particle load in the columbes, the number of current colums per second gives us a flow (I) In the amp. And we can write the above equation for the present: b = μ0I/(2πr).
It’s everywhere
What is what tells us is The electric current of the magnetic field createsHumanity is used in a variety of devices. For example, it gives us this electromagnetic, where the magnetic force can be turned on and off to move metal objects in factories and scrap. It is also how audio speakers create sound: an electric signal vibrates a magnetic driver, which creates pressure waves in the air.
Also Magnetic fields affect electrical currentsHumanity is the way the engine works. In the presence of a magnetic field usually created by some permanent magnets, the current is present through the coil. The force on the coil will rotate it and your engine is there. This can be a fan engine, part of your AC compressor or the main drive of an electric machine.
Wait! There is more exist just as an electric field changes a change of magnetic field, A magnetic field changes a change in an electric fieldAnd this creates an electric current. This is how most of our power is produced. Some energy source – sample, wind, moving water, whatever – a turbine that rotates a coil in a magnetic field. Changing the magnetic flux creates a voltage in the coil and converts mechanical energy into electrical energy that can be transferred to your home.
Magnetic measuring
How to measure how to measure μ0? A method uses what is called the current equilibrium. A simple version of this has two parallel wires that have an electric current (I) In the opposite directions, as shown in the chart below. Then you suspend the two wires with the strings so they can be separated, such as:
The current in each wire creates a magnetic field at the location of another wire and separates them. As the distance becomes, the magnetic force decreases and the horizontal component of the stress in the support field increases (due to the change in angle). When these two forces are equal, the wires will be “balanced”.
If you know the amount of electric current and the distance between the wires (Letter), You can determine the magnetic constant, μ0Humans. Then, as we showed above, you can use this value with the defined speed of light to calculate electric electricity, ε0Human
So, yes, in general, you can say that the magnetic constant is very important. Oh, and what is this fixed value? Based on the International Weight and Action Committee, μ0 = 1.256637061272 × 106.6 n/a2Human beings are no more, no less.
