Answered: The resistance of tunsgten filament at…

The resistance of tunsgten filament at 1750c° is 4ohm. Find the resistance of the filament at 20c°[take the temperature coefficient of resistance of tunsgten as 6×10^-3k^-1]

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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Concept explainers

Types of Thyristors

With four layers of alternating P- and N- materials, a thyristor is a solid-state semiconductor device. It acts as a type of bi-stable switch and it conducts when the gate receives a current trigger and continues to conduct until the voltage is reverse biased across the device or by some means until the voltage is removed. The silicon-controlled rectifier is considered synonymous with thyristors by some sources. Thyristors are defined as more complex by other sources as it contains at least four-layer of alternating N-type and P-type substrate. They find large applications in the control of electrical power supplies, electric motor speed control, and ranging of light dimmers because thyristors can control large amounts of power supplies and voltage with a small device. The circuit symbol of the thyristor is given below.

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The resistance of tunsgten filament at 1750c° is 4ohm. Find the resistance of the filament at 20c°[take the temperature coefficient of resistance of tunsgten as 6×10^-3k^-1]

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