Electricity & EquipmentQuestion 413 of 484
Which statement about the relationship between volts (V), amperes (A), and watts (W) is correct?
a.Volts = watts times amps
b.Amps = volts times watts
c.Watts = volts divided by amps
d.Watts = volts 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 A and B rearrange the variables incorrectly. Option C 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.
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