1500-W hair dryer is run on a 120-V rms circuit. If the circuit breaker is chosen from breakers with the ratings below, which is the lowest-rated current breaker of the following that won閳ユ獩 open the circuit?
Note: P = I V
10 A
15 A
20 A
30 A
60 A
Which won't open the circut?
As you have pointed out the power is a product of voltage used time the current consumed by the device. We have
P= V I then
I= P/V= 1500 / 120 = 12.5 A
I would take 15A breaker
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