Plz all mcq answer solve me.clearly... Multiple choicequestions1. If we decrease the input voltage of an asynchronous motor and the load is not changed, thenits rotation speed will ().A. decreaseB. stay unchangedC. increase2. If a single phase transformer (rated voltage:220V, rated frequency: 50Hz) is mistakenlyconnected to a source (220V, 60Hz), then the main flux at the rated load in the transformer will ().A. become largerB. become smaller C. stay the same3. The method to alter the rotation direction of a three-phase induction motor is ().A. changing the frequency of the input voltageB. changing the input voltageC. changing the order of the phases in the field windingsD. changing the number of poles

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1. If we decrease the input voltage of an asynchronous motor and the load is not changed, then its rotation speed will (). A. decrease B. stay unchanged C. increase

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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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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