Seasoned travelers know that an electrical device that works in one country may not work in another. Imagine taking a 1500 W hair dryer made in the United States, where the rms wall voltage is 120 V, to Australia, where the rms wall voltage is 230 V. Find the power output of the hair dryer when connected to a wall outlet in Australia. (5500W)
as we know
P = V^2/ R
R = V^2 / P
so
P2 / P1 = (V2/V1) ^2
P2 = 1500 * ( 230 / 120)^2
P2 = 5510 W
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Seasoned travelers know that an electrical device that works in one country may not work in...
A particular hair dryer is designed to operate in the United States, where electrical outlet voltage is 120V, and its power rating is 1800W.If we took this hair dryer to England, where the outlet voltage is 230V, and we plugged it directly into the wall, how much power would we get?
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