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This book is designed to meet the course on Engineering Physics Practicals  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 can understand the concepts and procedures of the experiments without much strain and is motivated to learn the concepts and principles with more zeal and interest. This volume examines twenty six practicals with the details of their aim, apparatus required, principle, procedure, observation, result, discussion, etc. The applications, precautions and questions for viva voce of the concerned experiment is a unique feature of this book. Written in a student-friendly manner the book is enriched with the following features: Twenty six experiments covering the whole syllabus of Engineering Physics Detail of applications of instruments related to the experiment Detail theory of the principle of experiment Viva voce questions on all the experiments Precautions to be taken while conducting the experiment Straight forward approach to illustrate the concepts of experiments. The book is mainly aimed for the First Year B.Tech. students of Jawahar Lal Nehru Technological University and all its affiliated colleges in Andhra Pradesh. The subject matter of the book is organized in such a way that all undergraduate engineering students of various other universities may also be benefitted. About the Author Dr. B. Srinivasa Rao, a Ph.D. in condensed matter physics from University of Bhopal, is presently working as Professor of Physics and Computer Science & Engineering and HOD, Department of Computer Science Engineering and Information Technology at Malla Reddy Engineering College, affiliated to Jawahar Lal Nehru Technical University, Hyderabad. He has also obtained PGDCS from University of Hyderabad and now pursuing MT (CS) from BITS Ranchi. With 25 years of teaching and research experience, he has published more than 30 research papers in journals of national and international repute. His areas of interest are computer simulations, computer networks, network security, embedded systems, real-time systems, neural networks and artificial intelligence. V.K.V. Krishna, an M.Sc. in Physics from Sri Venkateswara University, Tirupati, is presently Associate Professor in Physics, Department of H&S, Malla Reddy Engineering College, Hyderabad. With a more than 8 years teaching experience, he has attended various workshops and conferences in the fields Physics, Mathematics, Computer Science, and Engineering. He was also conferred the Best Teacher Award for the year 2007 in MREC. K. S. Rudramamba, an M.Tech. (CSE) from Acharya Nagarjuna University, Guntur, is presently Assistant Professor in Physics, Department of H&S, Malla Reddy Engineering College, Hyderabad. She is also pursuing Ph.D. on Nano Materials from Rayalseema University, Kurnul. With a 5 years teaching experience, she has attended various workshops and conferences in the fields of Physics, Mathematics, Computer Science, and Engineering. Table of Contents Chapter 1 Vernier Calipers Chapter 2 Screw Gauge Chapter 3 Spherometer Chapter 4 Coupled Oscillator Chapter 5 Volume Resonator Chapter 6 Sonometer Verification of Laws of Stretched Strings Chapter 7 Frequency of AC Supply Chapter 8 A.C. Sonometer - Electromagnet Method Chapter 9 Newton Rings Chapter 10 Parallel Fringes Chapter 11 Diffraction Grating Chapter 12 Dispersion of Light Chapter 13 Torsional Pendulum Chapter 14 Spectrometer - Determination of Cauchy's Constants Chapter 15 Lasers - Diffraction due to a Single Slit Chapter 16 Lasers - Diffraction due to a Double Slit Chapter 17 Numerical Aperture of Optical Fiber Chapter 18 Diffraction due to Single Slit (Sodium Light) Chapter 19 Diffraction due to Double Slit (Sodium Light) Chapter 20 Study of Losses in Optical Fibres Chapter 21 Meldes Experiment Chapter 22 Magnetic Field along the Axis of a Current Carrying Circular Coil - Stewart and Gee's Method Chapter 23 Energy Gap of Material of a pn Junction Chapter 24 Study of Time Constant for RC Circuit Chapter 25 The Series RLC Circuit Chapter 26 The Parallel RLC Circuit