Multiple choice

Thermal or heat-producing current with a high rate of oscillation or vibration is

  1. violet ray

  2. acidic current

  3. direct current

  4. electrode current

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The violet ray (Tesla high-frequency current) is a thermal, heat-producing current characterized by a high rate of oscillation, which makes it useful for scalp and skin treatments.