Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Every phone, charger and computer is built from a few pieces of silicon. A diode lets current pass one way only, a transistor makes a small signal large, and a gate answers yes or no. This chapter follows the idea from the energy bands of a crystal to the p-n junction, then to rectifiers, light devices, amplifiers and logic circuits. It covers the Indian syllabus (NCERT, NEET, JEE Main) and the matching topics of A-Level and IB. Python draws the waveforms and checks the truth tables.