Electricity and Light Therapy Flashcards

Which type of electrical current flows in only one direction and is used in galvanic treatments?

Answer: Direct current (DC)

Direct current (DC) flows in one direction only, which is why it is used in galvanic facial treatments that rely on a consistent polarity.

What unit is used to measure electrical resistance in a circuit?

Answer: Ohm

Electrical resistance is measured in ohms, named after physicist Georg Simon Ohm who developed the foundational law of electrical circuits.

Which safety device is designed to break a circuit by melting when too much current flows through it?

Answer: Fuse

A fuse is a safety device containing a metal wire that melts and breaks the circuit when current exceeds a safe level, preventing fires and equipment damage.

What does electrical grounding provide in salon electrical safety?

Answer: A safe path for excess electrical current to discharge into the earth

Grounding provides a safe pathway for stray or excess electrical current to discharge harmlessly into the earth, protecting clients and cosmetologists from electric shock.

In cosmetology, galvanic current is primarily used for which two facial services?

Answer: Iontophoresis and desincrustation

Galvanic current powers iontophoresis (driving ionic products into the skin) and desincrustation (using alkaline reaction to dissolve sebum and debris in pores).

What is the function of a rheostat in cosmetology electrical equipment?

Answer: To regulate or vary the strength of electrical current

A rheostat is a variable resistor used to adjust or regulate the intensity of electrical current flowing through equipment during treatments.

Which type of electrical current do high-frequency machines use to produce their warming and germicidal effects?

Answer: Alternating current (AC)

High-frequency machines use alternating current (AC) oscillating at a very high frequency, which creates a warming effect and produces ozone with germicidal properties.