Here are a few formulas for electrical power:
P = (voltage) x (current)
P = (voltage)² / (resistance)
P = (current)² x (resistance)
We know the voltage and the resistance, so it seems to me that
we should use the middle one.
Power = (voltage)² / (resistance)
= (120 volts)² / (460 ohms)
= (14,400 volts²) / (460 ohms)
= 31.3 watts .
That's not much power for a toaster. It produces about as much heat
as a small (30 watt) light bulb.
You would not sell many toasters designed like this one, because
it would take several days to toast a slice of bread.
A toaster that has what it takes to do the job will typically use
1200 watts to 1600 watts, just like a typical blow-dryer.
