Which statement about the relationship between volts (V), amperes (A), and watts (W) is correct?
a.Watts = volts times amps
b.Watts = volts divided by amps
c.Amps = volts times watts
d.Volts = watts times amps
Explanation
The power equation states that power in watts equals voltage in volts multiplied by current in amperes, so W = V x A. This is why a 1500 W appliance on a 120 V circuit draws 12.5 A, and why the same 1500 W on a 240 V circuit would draw only 6.25 A. Understanding the formula prevents overloaded circuits in the salon, an issue addressed by safe equipment use under CCR Title 16 §979.2. Option C and D rearrange the variables incorrectly. Option B divides where multiplication is required and is the formula that fails on every electrical exam item.
Law Reference: CCR Title 16 §979.2Practice all 484 questions free — no signup required.
Own the complete Cosmetology State Board guide — PDF + EPUB, $14.99 →
Related questions on this topic
- A licensed esthetician wants to perform a direct-application high-frequency facial. Which client condition is an ABSOLUTE contraindication that prohibits the treatment?
- Microcurrent facial devices deliver current measured in:
- A licensee plans to use a steamer and an LED facial panel simultaneously on the same client. The two devices must be plugged into:
- An extension cord rated for 13 A is used to power a 1500 W flat iron. What is the safest practice?
- An esthetician's intake form must screen for electrotherapy contraindications. Which set of CLIENT FACTORS is an ABSOLUTE contraindication for high-frequency, galvanic, OR microcurrent electrotherapy?
- A salon flat iron is rated 60 watts, a salon hair dryer is rated 1875 watts, and a curling iron is rated 90 watts. Which statement BEST describes their load on a standard 120 V salon circuit?
Last reviewed: · editorial process
PrepPass team · Verified against California Board of Barbering & Cosmetology Exam · How we review