The current in a hair dryer measures 19 amps. The resistance of the hair dryer is 14 ohms. What is the voltage?

1 answer:

6 0

Voltage = (current) x (resistance)

= (19 A) x (14 ohms) = 266 volts .

Note: Be careful using that thing !

It's dissipating

I² R = (19 A)² x (14 ohms) = 5,054 watts ! ! !

That's an awful lot of power for a blow-dryer !

The dryer is certainly not using very much of that power to run the fan.
Most of it is being used to heat air. 5 kilowatts is more power than most
toasters or microwave ovens use, so please be careful with how much of
your hair or skin you expose to that hot-air blast. You could probably cook
a meatloaf with it.

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