A tungsten lamp filament has a temperature of 20.5 degrees Celsius and a resistance of 500 ohms when taking normal working current. Calculate the resistance of the filament when it has a temperature of 25 degrees Celsius. RTC at 0 degree Celsius is 0.005/ºC.

A tungsten lamp filament has a temperature of 20.5 degrees Celsius and a resistance of 500 ohms when taking normal working current. Calculate the resistance of the filament when it has a temperature of 25 degrees Celsius. RTC at 0 degree Celsius is 0.005/ºC.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter4: Conductor Sizes And Types, Wiring Methods, Wire Connections, Voltage Drop, And Neutral Conductor Sizing For Services

Section: Chapter Questions

Problem 9R

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HVDC

HVDC stands for high voltage direct current in the electric power transmission system. The high voltage direct current system uses direct current (DC) for the transmission of electrical power through transmission lines in contrast with the alternating current that is the AC system. The HVDC is used to transmit bulk power point-to-point through long distances transmission lines. Power is rapidly transferred because the efficiency of transmission lines is greatly increased over long distances due to HVDC lines.

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