Two bulbs have the following ratings 40W at 220V and 40W at 110V. The filament of which bulb has more resistance
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Wattage is calculated on the basis on current flow (W=VI).
The current flow for 40W at 220V is much less compared 40W at 110V.
We can find out the resistance using formula R=V/I.
Using the above formula the resistance of the filament of the bulb having rating as 40W at 220V is more.
The current flow for 40W at 220V is much less compared 40W at 110V.
We can find out the resistance using formula R=V/I.
Using the above formula the resistance of the filament of the bulb having rating as 40W at 220V is more.
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