This textbook has been conceptualised to meet the needs of B.Sc. Second Semester students of Physics as per Common Minimum Syllabus prescribed for all Uttar Pradesh State Universities and Colleges under the recommended National Education Policy 2020. Designed strictly as per the syllabus, the first part of the textbook comprehensively covers the theory paper, Thermal Physics & Semiconductor Devices, which discusses important topics such as laws of thermodynamics, kinetic theory of gases, theory of radiation, DC & AC circuits, semiconductors & diodes and transistors. The second part of the textbook systematically covers the practical paper, Thermal Properties of Matter & Electronic Circuits, to help students achieve solid conceptual understanding and learn experimental procedures. Dr. P. S. Hemne, Ph.D., was formerly Principal and Head of Postgraduate Department of Physics at Nevjabai Hitkarini College (RTM Nagpur University, Nagpur). He has 40 years of teaching experience and has served as Chairman of Physics, Board of Studies (BOS), Gondwana University, Gadchiroli. C.L. Arora was formerly Principal at D.A.V. Post Graduate College, Jalandhar. Prior to this, he was Principal at D.A.V. College, Amritsar as well as D.A.V. College, Sholapur (Maharashtra). He was selected as Dean of College Development Council in Guru Nanak Dev University, Amritsar Sign Up for Newsletter