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What is the resistance when a 660w electric heater is operated from a 120v lines?
Wiki User
∙ 14y ago
We have to work this problem on a DC basis, since we know nothing about the power factor
of the supply, or the reactance of the heater.
Power in the load = E2 / R.
So R = E2 / P.
R = (120)2 / 660 = 21.82 ohms (rounded)
That's the resistance of the heater ... as the question is worded, it's not clear that the
questioner understands this.
Wiki User
∙ 14y ago
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