SPM Form 5 Physics Chapter 4 Electronics Revision Notes Whatsapp Cikgu Kwee now! Cathode Ray Oscilloscope Thermionic Emission Cathode Ray Structure of Cathode Ray Oscilloscope Using Cathode Ray Oscilloscope Uses of Cathode Ray Oscilloscope Semiconductor Holes and Free Electrons Flows of Free Electrons and Holes Doping a semiconductor N-Type Semiconductor P-Type Semiconductor Summary Semiconductor Diodes Forward Bias and Reverse Bias Diodes as Rectifiers Full Wave Rectification Capacitor Smoothing Transistors Connection of Transistors Current in Transistor Transistor as Current Amplifier Transistor as Automatic Switch Logic Gates Symbol, Boolean Algebra and Truth Table Combination of Logic Gate NAND gate as the universal gate