Two bulbs of same wattage, one having a carbon filament and the other having a metallic filament, are connected in series to the mains. Which one will glow more ?
Text Solution
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Resistance of carbon filament is more than that of metalic filament. In series combination, there will be same current through them. Since, heat produced, `H= I^(2)Rt`, therefore `H prop R`, thus carbon filament bulb will glow more.
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