The filament of a 240-volt metal-filament lamp is to be constructed from a wire having a diameter of 0.02 mm and a resistivity at 20°C of 4.3 un-cm. If a = 0.005/°C, what length of filament is necessary if the lamp is to dissipate 60 Watts at a filament temperature of 2420°C? 2.

The filament of a 240-volt metal-filament lamp is to be constructed from a wire having a diameter of 0.02 mm and a resistivity at 20°C of 4.3 un-cm. If a = 0.005/°C, what length of filament is necessary if the lamp is to dissipate 60 Watts at a filament temperature of 2420°C? 2.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Question

Include all decimal places in the computations, only final answers will be rounded off to four decimal places

The filament of a 240-volt metal-filament lamp is to be constructed from a wire
having a diameter of 0.02 mm and a resistivity at 20°C of 4.3 un-cm. If a =
0.005/°C, what length of filament is necessary if the lamp is to dissipate 60 Watts
at a filament temperature of 2420°C?
2.

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