Scientifically, the amount of electricity passing through any cross-section of a conductor per unit time is called current intensity, referred to as current.

André Marie Ampere (1775 - 1836), French physicist and chemist, distinguished for his work on electromagnetism and contributions to mathematics and physics.

The international unit of electric current, the ampere (named after its surname), is abbreviated as "ampere" and the symbol "A" also refers to the directional movement of electric charge in a conductor.

The free charge in a conductor forms an electric current when it moves regularly and directionally under the action of an electric field force.

Common conversion formula:

1kA=1000A

1A=1000mA

1mA=1000μA

1μA=1000nA

1nA=1000pA

Some common currents: electronic watches 1.5μA to 2μA, incandescent bulbs 200mA, mobile phones 100mA, air conditioners 5 A to 10 A, high voltage 200A, lightning 20000A to 200000A.