The objective of the laboratory is learning. The experiments are designed to illustrate phenomena in different areas of Physics and to expose you to measuring instruments. Conduct the experiments with interest and an attitude of learning.

You need to come well prepared for the experiment
Work quietly and carefully (the whole purpose of experimentation is to make reliable measurements!) and equally share the work with your partners.
Be honest in recording and representing your data. Never make up readings or doctor them to get a better fi ....etc

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if you again feel trouble on engineering chemistry lab practical exam viva questions with answers please reply in that page and ask specific fields in engineering chemistry lab practical exam viva questions with answers ....etc

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It is impossible to do an experimental measurement with perfect accuracy. There is
always an uncertainty associated with any measured quantity in an experiment even
in the most carefully done experiment and despite using the most sophisticated
instruments. This uncertainty in the measured value is known as the error in that
particular measured quantity. There is no way by which one can measure a quantity
with one hundred percent accuracy. In presenting experimental results it is very
important to objectively estimate the error in the meas ....etc

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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 laser radiation?

Laser radiations have high intensity, high coherence, high monochoromation and high directionality
with less divergence.
....etc

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ABOUT THE BOOK:
This book is designed to meet the course on Engineering Physics Practical of engineering curriculum for the First Year engineering students.
Laboratory work is an important part of the process of learning physics where students apply their knowledge practically.
As no textbook available on the market on Engineering Physics dealt with the experimental part in detail and so in the classroom lecture, the authors
bring out this book. The authors present this book in a very lucid style such that even a below average student ca ....etc

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1. Under which category Magnetic, electrostatic and gravitational forces come? Non-contact forces
2. No matter how far you stand from a mirror, your image appears erect, How is the mirror likely to be? Either plane or convex
3. Due to which Phenomenon are advanced sunrise and delayed sunset found in the sky? Refraction of sunlight
4. Due to which Phenomenon is the formation of colours in soap bubbles? Interference of light
5. On which principle a pressure cooker works? Elevation of boiling point of water by application of pressure
6. ....etc

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Examiner (E): What was the experiment allotted to you?

Students(S): Sir, I was assigned the experiment to determine the internal resistance of a primary cell using potentiometer.
E: OK, Tell me the principle of a potentiometer

S: Sir. The principle of a potentiometer is that the potential drop across any length of a wire of uniform cross section and composition and carrying a constant current is directly proportional to the length.
E: Good. What is internal resistance?

S: The resistance offered by the electrodes and electrolyte of a ....etc

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ppendix IV Sample Viva-Voce Questions
1) What do you mean by Hardware and Software?
All the electronic/electrical components and circuits used in a computer system are called hardware. A computer is actuated and controlled with the help of computer programs called software.

2) Mention the main components of a computer and their funtions.
CPU (cenral processing unit) to process the data
Input Device to enter the dat into the computer.
Output Device to display / print results by the computer.

3) What is Operating System(OS) ?
An operating sy ....etc

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physics practical viva questions for bsc

Q.1: Define surface tension?
Ans. The tangential cohesive force acting along the unit length of the surface of a liquid
T = F / L
Where F = total force along a line
L = length of the line
In this experiment:
F = m g = weight of the pan + weight in the pan.
L = 2 (length of the slide) + 2 (breadth of the slide).
Sometime we neglect the breadth since it is very small.

Q.2: What are units of surface tension in C.G.S. and S.I. (M.K.S.) system?
Ans. Dynes / cm (C.G.S.)
Newton / meter (M.K.S.)

Q.3: What ....etc

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Physicslab Sonometer Viva Questions
01. What is the principle involved in Sonometer experiment?
Ans: Resonance
02. Which type of waves are produced in Sonometer experiment?
Ans: Stationary Transverse waves
03. What are transverse waves?
Ans: If the vibrations of the particles are perpendicular to the propagation of the wave, those waves are said to be transverse waves.
04. Which type of transformer is used in sonometer experiment and what is it?
Ans: Step down transformer. It is a device, which converts high voltage currents to low volt ....etc

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