Question

Two electric bulbs marked 1oo w,220v,200w,220v have tungsten filament of same length which of the two bulbs will have thicker filament

Answer 1

Answer:

Hello friend

The resistance of 200W is lower than that in the 100W

Power= voltage*current= voltage*resistance and voltage is same

We know ,

resistance= resistivity*length /area

length and resistivity are same

so area is larger for 200W therefore,the 200w has the thicker filament

hope it help you friend

thanks!

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