Magnetic Field-Properties of Magnetic Field Lines

The influence of the magnetic field on moving electric charges, electric current, and magnetic materials is described in a magnetic field. A moving charge in a magnetic field experiences a force that is related to its own velocity and the magnetic field.

Magnetic Field

One of the four fundamental forces of nature is the magnetic field, which is produced by moving electric charges and the spin of elementary particles. Magnetic fields are used in modern technology in a variety of ways. Magnetic fields are used in both AC generators, DC generators, and electric motors. Magnetic circuits are investigated as a result of the interaction of magnetic fields in electric devices. Through the Hall effect, magnetic forces give information about the charge carriers in a material. The Earth’s magnetic field is important for navigation because it protects the ozone layer from solar wind.

Properties of Magnetic Field Lines

• The density of the field lines shows the strength of the field.
• Magnetic field lines always make closed loops.
• lines start from the north pole and end at the south pole
• Magnetic field lines never cross each other.

Magnetic fields Representation

It can be represented by continuous lines of force that emerge from north-seeking magnetic poles and enter south-seeking magnetic poles. The magnitude of the field can be determined by the density of the lines. When there is a strong magnetic field at the poles, the field lines are crowded together or denser. Farther away, where the magnetic field is not strong, they fan out and become less dense. The magnetic field is represented by equally parallel straight lines.

The north-seeking pole of a small magnet points in one of the directions of the flux. The closed loops are formed by the lines of flux being continuous. For a bar magnet, they emerge from the north-seeking pole, fan out and around, enter the magnet at the south-seeking pole, and continue through the magnet to the north pole, where they again emerge. The weber is the SI unit for the magnetic flux. The number of webers is a measure of the total number of field lines that cross a given area.

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