Answered: 7. When a breakover-type device is used…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Please choose the correct answer. 7. When a breakover-type device is used to trigger a triac, a. The triac’s temperature instability tends to be made irrelevant but the triac batch instability remains as a serious problem. b. The triac batch instability tends to be made irrelevant but the triac’s temperature instability remains as a serious problem. c. The triac’s temperature instability tends to be made irrelevant and the triac batch instability also tends to be made irrelevant. d. All of the choices 8. When a pulse transformer is used to couple the current from a UJT to the gate circuit of an triac, a. The phasing is usually noninverted, both top terminals the same polarity. b. The phasing is usually inverted, the two top terminals having opposite polarities. c. The phasing is irrelevant. d. The transformer must be operated in step-up mode, with the higher-turn winding used as the secondary. 9. When some aspect of the load’s performance is fed back to the triggering circuit of its controlling triac, the best breakover-type device is: a. a diac b. an SBS c. a UJT d. SUS

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