Lesson 2

Unit 2 — Electricity and Magnetism

Lesson parts

2.1 1.1 Free electrons and electric current

2.2 1.2 Electric current intensity

2.3 1.3 Electric potential difference (voltage)

2.4 1.4 Electric sources and electromotive force

2.5 1.5 Connecting electric cells

2.6 1.6 Electric resistance

2.7 1.7 Circuit symbols and circuit diagrams

2.8 1.8 Summary of Lesson 1

2.9 2.1 How is the current in a conductor determined? Ohm's law

2.10 2.2 Connecting identical resistors

2.11 2.3 Electric power and energy

2.12 2.4 Electrical safety

2.13 2.5 Summary of Lesson 2

2.14 3.1 The magnetic effect of electric current

2.15 3.2 The electromagnet

2.16 3.3 Magnetic force on a current-carrying wire

2.17 3.4 The simple electric motor (DC motor)

2.18 3.5 The electric generator

2.19 3.6 Summary of Lesson 3

2.20 📌 Comprehensive Scientific Terminology & Definitions:

2.21 ⚖️ Governing Scientific Laws, Principles & Mathematical Formulas:

2.22 🔍 In-Depth Explanations, Deductions & Core Concepts:

2.23 📊 Electrical Measuring Instruments in Prep 3 Science:

2.24 💡 High-Yield Exam Traps & Key Takeaways: