A Faradic coil is described as which statement?

• A. Contains a step-down transformer as one of its components
• B. Is a device for the production of an induced current
• C. Produces an induced current less than the original current source
• D. Contains a primary and a secondary coil

Answer: (D)

The key idea is that a Faradic coil transfers energy from one winding to another through mutual induction, using two coils arranged in magnetic coupling. Its defining feature is that there is a primary coil connected to the current source and a secondary coil that receives the induced current. The primary is often interrupted to produce rapid bursts, creating the Faradic pulses in the secondary. This dual-coil arrangement distinguishes it from devices described only as “a device for producing induced current” or from a generic step-down transformer, because the explicit presence and function of both a primary and a secondary coil is the defining characteristic.