This course is mainly useful for the students who are doing diploma and B.Tech (Bachelor of Technology). It is also useful for the students who are interested in learning fundamentals of electronics. This course covers the construction,working and applications of various electronic devices like PN Junction diode, zener diode, BJT, JFET and MOSFET. This course is designed to help students who are preparing for competitive exams. In this course, assaignments are given so that the students will be able to understand how the questions will be given in the exams.