Semiconductor Electronics
Class 12 Physics Semiconductor Electronics — energy bands, intrinsic and extrinsic semiconductors, n-type and p-type doping, the p-n junction, depletion region and barrier potential, forward and reverse bias, junction diode as a rectifier (half-wave, full-wave, filtering), Zener voltage regulation, LED, photodiode, solar cell, the bipolar junction transistor as switch and amplifier, current gain and logic gates with truth tables.
Study by topic — one focused page each
Semiconductors & the p-n Junction
Solids are classified by how they conduct electricity, and the key to understanding why lies in the energy band theory . When atoms come together to f…
Start this topic → 2Diodes & Their Applications
Because a junction diode conducts in essentially one direction, its most important job is rectification — converting alternating current (AC) into dir…
Start this topic → 3Transistors & Logic Gates
A bipolar junction transistor (BJT) is a three-layer, two-junction semiconductor device. It comes in two forms: npn (a thin p-layer between two n-laye…
Start this topic →Chapter-wide tests
Online Test
18 MCQ • 15 min
IMO / Olympiad Practice
Olympiad level • 15 min
📝 Full Chapter Test (Download & Print)
40 marks • 90 min • with answer key