Weber (unit) facts for kids
The weber (symbol: Wb) is a special unit used in physics. It's part of the SI system, which is like a worldwide standard for measurements. The weber measures something called magnetic flux.
Think of magnetic flux as the total amount of magnetism passing through a certain area. For example, if you have a magnet, its magnetic field spreads out. The weber helps us measure how much of that magnetic field goes through a specific space.
If you have one weber of magnetic flux spread evenly over one square meter, that's equal to one tesla. The tesla is another unit that measures how strong a magnetic field is in a specific spot.
The weber unit is named after a smart German scientist named Wilhelm Eduard Weber. He lived from 1804 to 1891 and did a lot of important work in physics.
What is the Weber?
The weber helps us understand how magnetism changes. It's connected to a rule in physics called Faraday's law. This law explains how a changing magnetic field can create electricity.
Imagine you have a loop of wire. If the amount of magnetic flux passing through that loop changes, it can create an electromotive force (EMF). This EMF is like a push that makes electricity flow.
Here's how the weber fits in:
- If the magnetic flux through a wire loop changes by one weber every second, it will create an electromotive force of one volt. A volt is the unit that measures electric potential difference, which is like the "pressure" that makes electricity move.
In simple terms, the weber tells us how much magnetic "stuff" is moving or changing, and that change can then create an electric "push."
How the Weber is Measured
The weber can be described using other basic units in physics. It's made up of units like kilograms (kg), meters (m), seconds (s), and amperes (A).
You can also think of the weber in a few different ways:
- One weber is the same as one tesla multiplied by one square meter (T·m2).
- It's also equal to one volt multiplied by one second (V·s).
- Or, it can be thought of as one joule per ampere (J/A).
Sometimes, you might hear about an older unit called the maxwell (Mx). One weber is equal to 100,000,000 maxwells!
- 1 Wb = 1 V·s
- 1 Wb = 1 T·m2
- 1 Wb = 1 J/A
- 1 Wb = 108 Mx (maxwells)
See also
In Spanish: Weber (unidad) para niños
