Di/dt is the differential of current with respect to time. Inductor is not a linear element like resistor, but it is nonlinear, so the voltage across it and the current flowing through it cannot be directly expressed by linear formula. Where l is the inductance, which is equivalent to the resistance value in the resistance circuit, and u=Ldi/dt. The concept of high school is to take the time derivative of current first and then multiply it by the inductance value, and then you can get the voltage at both ends of the inductance.

inductance

Inductance is a closed-loop property and a physical quantity. When the current passes through the coil, a magnetic field is induced in the coil, and the induced magnetic field will generate an induced current to resist the current passing through the coil. This interaction between current and coil is called inductance of electricity, and the unit is Henry (H), named after American scientist joseph henry. It is a circuit parameter that describes the induced electromotive force effect in this coil or another coil due to the change of coil current. Inductance is the general term for self-inductance and mutual inductance. Devices that provide inductance are called inductors.

Currently?

Scientifically, the amount of electricity passing through any section of a conductor in unit time is called current intensity, which is called current for short. Usually expressed by the letter I, its unit is ampere (André-Marie Ampère), 1775- 1836, a French physicist and chemist, who has made outstanding achievements in the research of electromagnetic action and contributed to mathematics and physics. Ampere, the international unit of current, is named after its surname. The symbol "a" also guides the directional motion of charges in the body.

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