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What happens if DC supply is applied to the transformer?

If DC supply is given to the transformer, the current will not change due to constant supply.
So the mutual induction is not possible and thus the transformer will not work.
The primary winding resistance is very small.
For DC supply, the primary winding inductive reactance is zero.
So the primary will draw very high current for dc supply, consequently extra heat generated and thus the transformer get damaged.
Hence the DC supply should not be applied to the transformer.
What is ....etc

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To get full information or details of viva questions for electrical machines 1 lab please have a look on the pages

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http://seminarsprojects.net/Thread-report-on-electrical-machines-of-bhel?pid=51675

http://seminarsprojects.net/Thread-electrical-machines-name-and-block-diagram?pid=61310#pid61310

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viva questions and answers for electrical measurements lab

Measurement and Instrumentation Lab - VIVA QUESTIONS
EXPNO.1 MEASUREMENT OF RESISTANCE USING WHEATSTONE BRIDGE
Explain the operation of Wheatstone bridge.
Name two advantages of a Wheatstone bridge over an ordinary ohmmeter.
What is the range of resistance can be measured using Wheatstone bridge
What do u meant by sensitivity?
What do u meant by selectivity?
What do u meant by accuracy?
What are the limitations of this bridge?
What are the other methods used for measurement of medium r ....etc

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system software lab lab viva questions and answers pdf

VIVA VOCE QUESTIONS WITH ANSWERS INTRODUCTION

1. Define system software.
It consists of variety of programs that supports the operation of the
computer. This software makes it possible for the user to focus on the other problems to be solved with out needing to know how the machine works internally.
Eg: operating system, assembler, loader.

2. Give some applications of operating system.
to make the computer easier to use
to manage the resources in computer
process management
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