Physics
High School (11–12)
Electronics › Semiconductors and DiodesElectronics › Transistors and Logic GatesChapter 27Semiconductor Electronics
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.
Part of Physics · High School (11–12) (chapter 27)
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Energy Bands, Doping and the p-n Junction
Why copper conducts, glass does not and silicon can be switched. Energy bands and the band gap, intrinsic and doped (n-type and p-type) crystals, and the p-n junction with its depletion layer, its barrier and its current-voltage curve. It serves the Indian syllabus (NCERT, NEET, JEE Main) and the matching topic of A-Level and IB.
Rectifiers, Zener Diodes and Light Devices
What a diode does in a circuit. Half-wave and full-wave rectifiers, the capacitor filter and the ripple, the Zener diode as a voltage regulator, and the LED, the photodiode and the solar cell. It serves the Indian syllabus (NCERT, NEET, JEE Main) and the matching topic of A-Level and IB.