Lecture 02 Applied Physics: Charge Conservation & Quantization

This is Lecture 04, Section A of Applied Physics, focusing on the fundamental principles of electric charge. The session covers charge conservation, quantization, electrostatic force, conductors/insulators/semiconductors, and even particle-antiparticle annihilation.

📌 Key Topics Covered with Timestamps:
0:58 – Electrostatics: Charge types, Electrostatic force, Conductors, Insulators, Semiconductors
20:50 – Radioactive decay (Uranium → Thorium example)
31:13 – Matter-antimatter annihilation & energy conversion
33:17 – Electron-positron annihilation into gamma rays (net charge = 0)
40:05 – Charge Quantization rule: q = n × e (integral multiples of fundamental charge)
42:23 – Solved Problem 1: How many electrons removed to get +1.0×10⁻⁷ C on a coin?
43:51 – Solved Problem 2: Excess electrons on water drops (q = 1.00×10⁻¹⁶ C, separation 1.00 cm)

🎯 What You Will Learn:
Why charge is quantized (only ±e, ±2e, ±3e, …)
Law of charge conservation in decays and annihilations
How to calculate number of excess electrons from total charge
Distinction between conductors, insulators, and semiconductors
👨‍🏫 Target Audience: Engineering students, Physics majors, anyone preparing for exams in applied physics or electromagnetism.

🔔 More Lectures: Check playlist for Lecture 01

Видео Lecture 02 Applied Physics: Charge Conservation & Quantization канала Ghazali Club