Electricity & EquipmentQuestion 95 of 484
During iontophoresis with a galvanic machine, a water-soluble product with a negative pH (acidic) is introduced under which electrode?
a.Under the cathode (negative pole)
b.Under the anode (positive pole)
c.Under either pole, the result is identical
d.Under no electrode; the product is applied first and the machine is then turned off
Explanation
Like charges repel. An acidic, positively ionized product is pushed into the skin from the positive (anode) pole because the matching positive charge of the electrode repels the ions inward.
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