An incandescent light bulb produces light using a thin tungsten filament (wire) heated to about 3000 K
Question:
An incandescent light bulb produces light using a thin tungsten filament (wire) heated to about 3000 K by an electric current that passes through it. A typical filament has a diameter of 10 µm and a length of 2.0 cm.
(a) What is the rate at which heat energy is emitted by the filament?
(b) When the current through the filament is turned off, the filament cools as heat is radiated away. Estimate how long it takes the filament to cool 100 K to a final temperature of 2900 K.
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The total amount of energy radiated by an object can be found using the StefanBoltzmann law using th...View the full answer
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Related Book For 
College Physics Reasoning and Relationships
ISBN: 978-0840058195
2nd edition
Authors: Nicholas Giordano
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