AUTOTRAFO (Automatic Transformer).

Autotrafo shape is similar to regular transformer, but is rarely found on the transformer primary and secondary windings are separate, single coil windings only wound on an iron core, but there are some terminal settings input voltage and input voltage.
Transformer of this type consists of only one electric coil which continues, with the middle lead. In this transformer, partial primary windings is also a secondary winding. Phase current in the secondary windings are always opposed to the primary current, so for the same power tariff secondary windings can be made with a wire thinner than usual transformer. The advantage of autotransformator is a small physical size and lower loss than other types of two loops. But this type of transformer can not provide electrical isolation between the primary winding with the secondary windings.

X-RAY DEFINITION

X-rays are a form of electromagnetic radiation, just like visible light. In a health care setting, a machines sends are individual x-ray particles, called photons. These particles pass through the body. A computer or special film is used to record the images that are created.

Structures that are dense (such as bone) will block most of the x-ray particles, and will appear white. Metal and contrast media (special dye used to highlight areas of the body) will also appear white. Structures containing air will be black and muscle, , and fluid will appear as shades of gray.