Answered

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An electric filament lamp is connected to a power supply and switched on.
The filament glows.
Explain why the temperature of the filament rises initially and then stays constant.

Sagot :

kirugu
This is because of of the heating effect of a current. The glow is a result of current passing through the filament. The current experiences resistance as a result heat is generated. When resistance is at zero, there potential differences is not needed hence temperature generated will be at a constant.

Initially when the lamp is turned on , the resistance of the lamp is low  hence a huge amount of current passes through it which makes the temperature of the filament to rise. once the filament gets heated , its resistance will increase to a larger extent as resistance increases with increase in temperature.  So this  decreases the current passing through it. Hence the temperature stays constant

What is a filament lamp?

A filament lamp is a common type of light bulb. It contains a thin coil of wire called the filament. This heats up when an electric current passes through it, and produces light as a result.

What is resistance ?

The hinderance to the flow of current is called resistance.

To know more about filament bulb here

https://brainly.com/question/16909326

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