CAMRT Radiography Practice Exam

True or False: Autotransformers select the amount of voltage sent to the transformer.

1. True

2. False

3. Depends on the transformer type

4. Only in specific models

The correct answer is: True

Autotransformers play a crucial role in the operation of radiographic systems by allowing the selection of varying voltage levels. They are designed to provide a variable output voltage from a single input voltage by utilizing a winding that serves as both the primary and secondary circuit. This ability to adjust the voltage is essential for controlling the current and consequently the exposure levels during radiographic procedures. The function of autotransformers is based on the principle of electromagnetic induction, where a portion of the winding is tapped at various points to achieve the desired voltage output. This means that by selecting different tap points on the transformer, the operator can effectively change the voltage being sent to the transformer, thus controlling the voltage supplied to the x-ray tube. This capability is fundamental in radiography, where different examinations may require different voltage levels for optimal image quality. Therefore, stating that autotransformers select the amount of voltage sent to the transformer is accurate, making the statement true.