KOMPAS.com The area around a magnet that is still affected by the magnetic force is called magnetic field.
Usually, magnetic fields are represented as lines of magnetic force and are indicated by arrows.
Please note that the magnetic field is not only generated from a magnet, but can also be generated from a wire carrying an electric current.
A long straight wire carrying a direct current will produce a magnetic field around it.
The concept of a magnetic field around a wire carrying an electric current was discovered accidentally by Hans Christian Oersted (1770-1851).
In 1820, Oersted conducted research on the effect of the magnetic field around a current-carrying wire.
It was Oersted’s experiment that started further research on the shape of the magnetic field produced by electric energy.
Magnetic lines of force
Reporting from the Learning Resources of the Ministry of Education and Culture (Kemdikbud), there are several things that need to be considered regarding magnetic lines of force, namely:
- Magnetic lines of force do not intersect.
- Magnetic lines of force always leave the north pole of the magnet and enter the south pole of the magnet.
- Areas where the lines of magnetic force are close together indicate a strong magnetic field.
- Areas with loose magnetic lines indicate a weak magnetic field.
Magnitude of magnetic field
The factors that affect the magnitude of the magnetic field at a point are:
- The magnitude of the magnetic force experienced by that point.
- Inversely proportional to the distance of a point to a magnetic source.
Application of the concept of a magnetic field
Magnets have been used for a long time to facilitate various human tasks.
Reported from Sciencing, Here are some examples of the application of magnets in everyday life:
1. Computers and electronics
Many computers use magnets to store data on the hard drive.
Small speakers in computers, televisions, and radios also use magnets.
Inside the speaker, coils of wire and magnets convert electronic signals into sound vibrations.
2. Electric power and other industries
Magnets offer many benefits to the industrial world. Magnets in electric generators convert mechanical energy into electricity, while some motors use magnets to convert electricity into mechanical work.
As another example, mines use magnetic sorters to separate useful metal ores from crushed rock.
Magnets are found in some commonly used medical devices, such as Magnetic Resonance Imaging (MRI).
An MRI uses a strong magnetic field to generate radio signals such as radar from inside the body.
MRI also uses these signals to create clear and detailed images of bones, organs, and other tissues.
Get updates news of choice and breaking news every day from Kompas.com. Let’s join the Telegram group “Kompas.com News Update”, how to click the link https://t.me/kompascomupdate, then join. You must first install the Telegram application on your cellphone.