What are the two types of electrotherapy described?

What are the two types of electrotherapy described?

• A. Static and current
• B. Direct current and alternating current
• C. Positive and negative
• D. Thermal and mechanical modalities

Answer: (A)

The main idea here is that electrotherapy modalities are described in two broad ways: static electricity and electric current. Static electricity refers to a nonflowing or constant electrical charge applied to tissues, relying on electrode polarity and electrochemical interactions at the skin to produce effects. Electric current covers anything involving a flow of electrons—direct, alternating, or pulsed—delivering energy through tissues to produce physiological responses like nerve modulation, muscle activation, or tissue healing. This distinction explains why the best answer lists static and current as the two types. The other options don’t fit as broad classifications. Positive and negative describe electrode polarity rather than a modality type. Direct current and alternating current are both forms of current electricity and don’t capture the broader category of static electricity versus current. Thermal and mechanical modalities refer to non-electrical treatment methods.

The main idea here is that electrotherapy modalities are described in two broad ways: static electricity and electric current. Static electricity refers to a nonflowing or constant electrical charge applied to tissues, relying on electrode polarity and electrochemical interactions at the skin to produce effects. Electric current covers anything involving a flow of electrons—direct, alternating, or pulsed—delivering energy through tissues to produce physiological responses like nerve modulation, muscle activation, or tissue healing. This distinction explains why the best answer lists static and current as the two types.

The other options don’t fit as broad classifications. Positive and negative describe electrode polarity rather than a modality type. Direct current and alternating current are both forms of current electricity and don’t capture the broader category of static electricity versus current. Thermal and mechanical modalities refer to non-electrical treatment methods.