12.1 ELECTRIC FORCES
12.1.1 Like Charges Repel, Unlike Charges Attract | 🎧
12.1.2 Electric Force between Two Point Charges | 🎧

12.2 ELECTRIC POTENTIAL ENERGY
12.2.1 Why EPE can be Positive and Negative | 🎧
12.2.2 Derivation of EPE Formula | 🎧

12.3 ELECTRIC FIELD
12.3.1 Electric Field | 🎧
12.3.2 Electric Field of a Point Charge | 🎧

12.4 ELECTRIC POTENTIAL
12.4.1 Electric Potential | 🎧
12.4.2 Electric Potential of a Point Charge | 🎧

12.5 ENERGY AND POTENTIAL GRADIENT
12.5.1 Energy and Potential Gradient | 🎧

12.6 ELECTRIC FIELD MAPPING
12.6.1 Field Lines | 🎧
12.6.2 Equipotential Lines | 🎧

12.7 CHARGED CONDUCTORS
12.7.1 Charged Metal Spheres | 🎧
12.7.2 Charged Metal Parallel Plates | 🎧

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Concept Videos: Click here

Demonstrations: Click here

Applets:
PhET Balloon and Static Electricity: Click here
PhET John Travolta: Click here
PhET Electric Field of Dreams: Click here
PhET Charges and Fields: Click here
PhET Electric Hockey: Click here
Falstad vector (field visualisation): Click here

Supplementary Reading
It’s All Electric: Click here
Electric vs Gravitation: Click here