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Introduction to the seven core laws in electromagnetism

The six basic laws of Electromagnetics are unfolded. They are the law of conservation of charge, Coulomb's law, Biosal's law, Ohm's law, Faraday's law of electromagnetic induction, Lenz's law, and Ampere's rule.
The law of conservation of charge is not only one of the basic laws of electromagnetism but also one of the most basic laws of physics. The law of conservation of charge indicates that no matter what happens in an isolated system, the sum of the algebras of the charges it contains remains unchanged. The law of conservation of charge indicates that as long as the amount of charge in a certain position increases or decreases, there is bound to be a corresponding amount of charge entering or leaving the position.
Coulomb's law is the first electromagnetic law in the history of electromagnetism. It was published in 1785 by the French electrician and physicist Coulomb. Coulomb's law states that when the interaction force between two stationary point charges in a vacuum is proportional to the product of the magnitude of the force and the amount of charge, it is inversely proportional to the square of the distance between them. The direction of the force lies on the line between them, the same charge will repel, and the different charges will attract each other.
Biosvall's law is a law of magnetostatics, which mainly shows the magnitude of the magnetic field excited by a current element at a random point P in space. Biosvall's law states that the magnetic induction generated by a current element in any space P is proportional to the magnitude of the current element, and between the position of the current element and the position vector of the P point and the current element. The sine value of the angle is proportional to the square of the distance from the current element to the point P, and the direction of the vector conforms to the right-hand rule. Biosvall's law can reveal the general quantitative law of the magnitude of the force acting on the magnetic pole.
Faraday's law of electromagnetic induction is one of the most important discoveries of Faraday's discovery in 1831. It is also one of the most significant discoveries in electromagnetism. This law reveals the interconnection and transformation between electricity and magnetism. Faraday's law of electromagnetic induction indicates the phenomenon of induced electromotive force generated when the magnetic flux changes. When a part of the conductor of a closed circuit is in the magnetic field to cut the magnetic line, the conductor will generate current relative to it. The formula is e=-n(dΦ)/(dt), which shows that all mechanical energy can be converted into electrical energy.
Lenz's law is a law published by physicist Heinrich in 1834 to judge the direction of induced current. The law of Lenzing indicates that the effect of induced current always resists the cause of it. If a change in the induced current is caused by a change in the magnetic flux passing through the loop in the circuit, the magnetic flux generated by the induced current in the loop will always act to hinder the change of the original magnetic flux. We can simply say that the law of 楞 is the law of “rejecting to stay”.
Ampere's rule is also often called the right-handed screw rule. When there is a magnetic field around the current, the direction of the magnetic field has a correlation with the direction of the current. The direction of the magnetic field of the solenoid through the current is also related to the direction of the current; Hold the energized straight wire with your right hand, then the direction of the thumb is the direction of the current, and the direction of the four fingers is the direction of the magnetic line.
A brief description of Ohm's law is that in the same circuit, the magnitude of the current through a segment of the conductor is proportional to the magnitude of the voltage across the conductor and inversely proportional to the resistance of the conductor. The law was proposed by the German physicist George Simon Ohm in April 1826, "The Determination of Metal Conduction Law."
Ohm's law was published in 1826 by the German physicist George Ohm. Ohm's law briefly states that in a circuit, the magnitude of the current through a conductor is proportional to the voltage across the conductor and inversely proportional to the resistance of the conductor. The formula can be expressed as: I=U/R. Ohm's law plays a facilitating role in linking the potential difference, current intensity and resistance.
Electromagnetism is a branch of physics that originated in modern times. Electromagnetism can be said to include electricity and magnetism, and plays an extremely important role in the development of science and technology.

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