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Light bulbs


Kevin Weddle
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What's the purpose of this thread? Are you asking a question or making a statement?

An incandescent light bulb is nearly purely resistive and has virtually no reactance so will have a power factor near 1.

The resistance of the filament varies with temperature which is also dependant on the current so the current drawn by the bulb when it's on can't be deturmined by measuring its cold resistance and applying Ohm's law.

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