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.

Extended data:

Other symbols of the component are as follows:

1, power supply: e

Power supply is the most important equipment in circuit connection. With power supply, the circuit can work normally. Power supply is often represented by e.

2. diode: d?

Crystal diodes are usually represented by "D" plus numbers in circuits. For example, D5 is represented by the number 5. The main feature of electrode tube is unidirectional conduction, that is, under the action of DC voltage, the on-resistance is very small; However, under the action of reverse voltage, the on-resistance is extremely large or infinite.

3. triode: q?

Transistors are often used as connections for basic amplifier circuits. * * * has three pins, generally denoted by Q. A triode has an emitter, a base and a collector.

4. switch: s

The switch is responsible for controlling the on-off of the circuit, and it is an essential device in circuit safety, which is often represented by S.

Baidu encyclopedia-inductance