Physics Lab Viva Voce Questions and its answers Laser Parameters



1. What is semi conductor diode laser?
Semiconductor diode laser is a specially fabricated pn junction diode. It emits laser light when it is
forward biased.

2. What is LASER?
The term LASER stands for Light Amplification by Stimulated Emission of Radiation. It is a device
which produces a powerful, monochromatic collimated beam of light in which the waves are coherent.

3. What are the characteristic of ....etc

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i need the frequently asked viva questions regarding EC2259
electrical engineering and control system lab viva questions with answers.its not here ....etc

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i m archan studying BE ece in anna university.i kindly request you to send me the 4th semester lab manuals,notes,and question papers. ....etc

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In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions. The emerging coloration is a form of structural coloration. The directions of these beams depend on the spacing of the grating and the wavelength of the light so that the grating acts as the dispersive element. Because of this, gratings are commonly used in monochromators and spectrometers.

For practical applications, gratings generally have ridges or rulings on their sur ....etc

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What do you know about Java?
What are the supported platforms by Java Programming Language?
List any five features of Java?
Why is Java Architectural Neutral?
How Java enabled High Performance?
Why Java is considered dynamic?
What is Java Virtual Machine and how it is considered in context of Java s platform independent feature?
List two Java IDE s?
List some Java keywords(unlike C, C++ keywords)?
What do you mean by Object?
Define class?
What kind of variables a class can consist of?
What is a Local Variable?
What is a Instance Variable?
Wha ....etc

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why to go for testbenches.its uses.difference between serial & parallel adder.use of counter ....etc

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Introduction

What is Automation?

- Automation is making a process automatic, eliminating the need for human intervention.
- Is a self-controlling or self-moving process.
- Automation software offers automation wizard and commands of its own in addition to
providing task recording and re-play capabilities.
- Using these tools we can record the task
- Then if needed use the editor to edit the task, add new commands or using GUI automation
wizards

Benefits of Automation

Fast: test automation runs faster than human users
Reliable: it perform ....etc

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viva questions and answers for plc lab

What are different comonents in PLC?
Answer: 1. Input Interface 2. Memory Section 3. Central Processing Unit (CPU) 4. Programmable Language 5. Programming tool 6. An output Interface

Advantages of PLCs than Hard wired Relay?
Answer: PLCs are highly reliable, easily programmable, Small and Inexpensive, PLCs can be designed with the communication capabilities so they can converse with the local or remote computer, They can sustain in robust environment less maintenance.

What is the programmable language ....etc

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