A 60 w bulb has a filament temperature of 2000 K. what will be the wattage of another bulbs of same filament area and material at a temperature of 4000 K?A. 8 wB. 32 wC. 64 wD. 960 w

A 60 w bulb has a filament temperature of 2000 K. what will be the wat

1.	A 60 w bulb has a filament temperature of 2000 K. what will be the wattage of another bulbs of same filament area and material at a temperature of 4000 K?A. 8 wB. 32 wC. 64 wD. 960 w
Answer» Correct Answer - D `(P_(2))/(P_(1))=(T_(2)^(4))/(T_(1)^(4))=((4000)/(2000))^(4)=16` `P_(2)=16xxP_(1)=16xx60=960w` `P=sigma A rhoT^(4)`

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A 60 w bulb has a filament temperature of 2000 K. what will be the wattage of another bulbs of same filament area and material at a temperature of 4000 K?A. 8 wB. 32 wC. 64 wD. 960 w

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