two electric bulbs marked 100w 220v and 200w 200v have tungent filament of same length . which of the two bubls will have thicker filament?

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Solution

100w 220v and 200w 200v have tungent filament of same length . which of the two bubls will have thicker filament?
We know,
P = V²/R
â‡’More the power, lesser the resistance. The resistance of 100W bulb is more than the 200W bulb.
R = Ïl/A
â‡’Higher the resistance, thinner will be the wire. The wire of 200W bulb is thicker than 100W bulb.
Basically,
P âˆA

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