PTA Physical Therapy Assistant

Answer: B - The uninterrupted bidirectional flow of electrons is called alternating current.

The alternating current is used for treating pain, and muscle contractions, etc.

Uninterrupted unidirectional flow of electrons is called direct current.

Pulsed unidirectional flow of electrons is called monophasic pulsed current.

Pulsed bidirectional flow of electrons is called biphasic pulsed current.