There are three categories of Physics Olympiads—Junior, Secondary and Higher Secondary. This book contains solutions and explanations of more than 200 advanced questions from the Junior Category Physics Olympiads held in Bangladesh from 2012 to 2020. We know that solving the problems of the Physics Olympiad is not a matter of to be learnt overnight. For this, students in each category have to have a good idea about Physics fundamentals. Then if they can understand the solution and explanation of various problems, then they can easily guess a pattern in them. In this way they will understand where to start and how to proceed to solve a problem very quickly. This compilation is not a conventional problem-solution book; it contains the necessary explanations and analysis of related topics along with the solutions. So by using this book, students will be able to gain practical ideas about the fundamentals of Physics. In addition to the necessary formulas of Physics, it contains the syllabus of the Physics Olympiad and some important information about the Olympiad.