Electricity & EquipmentQuestion 92 of 484
Which type of electric current flows in one direction only and is used in galvanic electrotherapy devices?
a.Alternating current (AC)
b.Direct current (DC)
c.Faradic alternating current
d.Tesla high-frequency current
Explanation
Direct current (DC) is a constant, one-directional flow of electrons. Galvanic devices use DC because chemical reactions such as iontophoresis and desincrustation depend on a steady polarity.
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