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# What is the magnetic permeability of a vacuum? Who I am
Carlos Laforet Coll
@carloslaforetcoll Author and references
What is the magnetic permeability of a vacuum?

## What is the magnetic permeability of a vacuum?

The magnetic permeability of vacuum, usually indicated with the symbol μ0, is equal to 4π ∙ 10–7H / m in the international system of units (SI).

## How much is mu worth in physics?

The magnetic permeability constant is indicated with the Greek letter μ (“mu”) and in the void (zero subscript) it assumes this value: approximable with the number value of 1,26 ∙ 10-6 N / A2.

## What is relative permeability How are magnetic materials classified according to it?

Depending on the value that the relative magnetic permeability constant μr assumes, diamagnetic, paramagnetic and ferromagnetic materials are distinguished respectively if it is slightly lower than 1, slightly higher than 1 or much higher than 1.

## How is magnetic permeability calculated?

Magnetic permeability
1. The magnetic permeability constant μ is instead equal to the product of a constant typical of each material and expressed by the relative magnetic permeability μr for the magnetic permeability in vacuum:
2. μ = μr ∙ μ0.

## What does MU mean in physics?

In elementary particle physics, the letter μ is the symbol of the muon. Micro- prefix symbol; given the symbol of a unit of measurement / "> measure, it divides the value by 106: for example, μm = micrometer = 10–6 meters; μV = microvolt = 10–6 volts.

## How are magnetic materials classified according to their permeability?

- paramagnetic materials, if the relative magnetic permeability is slightly higher than 1, as happens in the case of air, aluminum and platinum. is strictly less than 1; - ferromagnetic materials, if the relative magnetic permeability is considerably higher than 1.

## How to calculate the magnetic permeability?

Magnetic permeability
1. The magnetic permeability constant μ is instead equal to the product of a constant typical of each material and expressed by the relative magnetic permeability μr for the magnetic permeability in vacuum:
2. μ = μr ∙ μ0.

## Why do you say Mu and not me?

It is a bilabial nasal consonant, common as mu in the scientific and technical fields. In the number system of the Hellenistic Greeks, it was the symbol used for the number 40 (with a dash at the top right; with a dash at the bottom left, it represented the number 40 000).

## How are magnetic materials classified?

Depending on the interaction of atomic magnetic moments with an external magnetic field, it is possible to classify materials into three classes: diamagnetic, paramagnetic and ferromagnetic.

## What is the hardest rock?

Is there a harder element than diamond?
• Lonsdaelite.
• Wurtzite (boron nitride)
• Diamond.
• Borazone (cubic boron nitride)
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