Question: What happens if a 40-W light bulb, designed to be connected to an ac voltage with amplitude 170 V and frequency 60 Hz, is instead

What happens if a 40-W light bulb, designed to be connected to an ac voltage with amplitude 170 V and frequency 60 Hz, is instead connected to a 170-V dc power supply? Explain. What dc voltage would make the light bulb burn with the same brightness as the 170 V peak 60-Hz ac?

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An ac voltage with amplitude of 170 V has an rms value of about 120 V For a light bulb which ... View full answer

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