The reason why the incandescent lamp is dim after a long time is that the resistance of the filament becomes larger and the current passing through becomes smaller. What is the reason for the change of resistance?

The reason why the incandescent lamp is dim after a long time is that the resistance of the filament becomes larger and the current passing through becomes smaller. What is the reason for the change of resistance?

The tungsten filament (filament) will sublimate after being used for a long time, making the filament thinner and the resistance larger (pay attention to the control variables)

How many squares is 1 / 2 equal to 2
(1/2)^?=2

-1 .

How many years is an acre of land equal to?

One mu = 666.667 square meters
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