Problem 2.3] a wire having a diameter of 0.02mm and a resistivity at 20°C of 4.3µQ-cm. If a = 0.005/°C, what length of filament is necessary if the lamp is to dissipate 60watts at a filament temperature of 2420°C? The filament of a 240V metal filament lamp is to be constructed from

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
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ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter16: Installation Of Heating, Cooling, And Refrigeration Systems
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Fundamentals of Electric Circuits. 

Problem 2.3]
a wire having a diameter of 0.02mm and a resistivity at 20°C of 4.3µQ-cm. If a =
0.005/°C, what length of filament is necessary if the lamp is to dissipate 60watts at a
filament temperature of 2420°C?
The filament of a 240V metal filament lamp is to be constructed from
Transcribed Image Text:Problem 2.3] a wire having a diameter of 0.02mm and a resistivity at 20°C of 4.3µQ-cm. If a = 0.005/°C, what length of filament is necessary if the lamp is to dissipate 60watts at a filament temperature of 2420°C? The filament of a 240V metal filament lamp is to be constructed from
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