CAMRT Radiography Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the CAMRT Radiography Exam. Prepare with our comprehensive quiz that features multiple choice questions along with hints and explanations designed to enhance your understanding. Get ready to excel in your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What type of current do autotransformers require for operation?

DC current
AC current
Both AC and DC current
None of the above

The correct answer is: AC current

Autotransformers require alternating current (AC) for operation due to their design and function. They operate on the principle of electromagnetic induction, which relies on a changing magnetic field to transfer energy between windings. This changing magnetic field is produced by AC, as direct current (DC) does not create a varying magnetic field. As a result, autotransformers are used in applications like voltage regulation and power distribution, where the ability to adjust voltage levels while maintaining efficiency is essential. Therefore, the correct answer identifies the necessity of AC current for the efficient operation of autotransformers.