The electrical current is conveyed from the revolving portion of the crane to the lower crane structure through the collector ring system.
The movement of electrical charges through space or a conductor is called electric current.
It is a stream of particles having definite charges that flow between two endpoints of a conductor.
Daily life examples include watching TV, charging a cell phone, turning a light on, cooking a stove, and starting a car.
In Si units, electric current is measured in ampere i.e. A. It means the flow of one-coulomb charge through a point in one second.
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