What is a magnetic dipole?
Magnetic dipole can be considered a basic observable unit of magnetism. Most intuitively, the dipole consists of two same but contradictory points or poles. The interaction between the two charged monopolies creates a vector field of force in the vicinity known as a magnetic field. The well -known examples of magnetic dipoles include bar magnets, electrons and planet Earth itself. Moreover, monopolies have never been observed. Rather, the monopolies are hypothetical particles. Interestingly, the existence of monopolies was assumed by theoretical physics and existence and the nature of monopolies was an open question in science. In 1820, Hans Christian Oursted found that a closed electrical circuit or a closed current loop creates a magnetic field. He did it by placing an electrically charged wire near the compass and noticed that the needle was moving. The current loop was to create a magnetic field that affected the magnetic needle or dipole in the compass. Dipo magnetic materialAla, such as a molding magnet, can be modeling by imagining the structure as filled with small jet loops. Models using these current loops predict behavior in magnetic materials with great success.
The dipole strength is measured as a magnetic dipole moment. The moment is a vector, which means it is size or size as well as direction. When considering magnetic poles, such as those in the bar magnet, the magnetic moment (m) is defined as the strength of the poles (P) of the multiplied distance between the poles (L), which can be represented by the equation M = pl. The direction of the moment shows the magnet from the South Pole to its North Pole.
The magnetic moment can also be defined for the magnetic dipole created by electric current. In this case, the magnetic moment is equal to the current (I) of the multiplied area in the current loop, which can be represented by the M = IS equation. The direction of this moment can bedetermined by the right rule. To use this rule, one holds the right hand forward and leaves the fingers of curvature or gets fist in the same direction as the current. The person's right thumb, if it is held straight, will head towards the moment of the magnetic dipole.