Most salon hair dryers, clippers, and overhead lights plug into wall outlets that supply which type of current?
a.Direct current at 9 V
b.Alternating current at 120 V
c.Galvanic direct current
d.High-frequency Tesla current
Explanation
Standard United States wall outlets deliver alternating current (AC) at roughly 120 volts and 60 hertz. Salon equipment such as dryers and clippers is built to run on this AC supply.
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