Välisjõuallikana

Välisjõuallikana refers to an external power source. In physics and engineering, an external power source is any device or system that provides energy to a separate entity, allowing it to perform work or function. This is in contrast to internal power sources, which are part of the object or system itself.

Common examples of external power sources include batteries, generators, electrical grids, solar panels, and even pneumatic or hydraulic systems. When a device requires power to operate, and that power is not generated internally, it is drawing from an external power source. For instance, a laptop computer typically uses an AC adapter plugged into a wall outlet as its external power source for charging and operation, while a portable flashlight relies on batteries as its external power source.

The concept of an external power source is fundamental in understanding energy transfer and the operation of numerous machines and devices. The efficiency, voltage, current, and capacity of the external power source are critical factors in determining the performance and longevity of the powered system. Maintenance and reliability of external power sources are also important considerations to ensure continuous operation of the connected equipment.