We can measure the temperature of an incandescent bulb's filament while it's connected to a variable DC power supply.
from Science Latest https://www.wired.com/story/need-an-ohms-law-party-trick-take-a-lightbulbs-temperature
from Science Latest https://www.wired.com/story/need-an-ohms-law-party-trick-take-a-lightbulbs-temperature
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