Question
The heating element of a hair dryer dissipates $1500 \mathrm{W}$ when connected to a $120 \mathrm{V}$ outlet. What is the resistance?
Step 1
According to Ohm's law, the resistance (R) is equal to the voltage (V) squared divided by the power (P). This can be written as: \[ R = \frac{V^2}{P} \] Show more…
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