4.2.1 — Electric charge

Core

• 4.2.1.1 — State that there are positive and negative charges
• 4.2.1.2 — State that like charges repel and unlike charges attract
• 4.2.1.3 — Describe simple experiments showing production of electrostatic charges by friction and their detection
• 4.2.1.4 — Explain that charging by friction involves transfer of electrons only
• 4.2.1.5 — Describe an experiment to distinguish between electrical conductors and insulators
• 4.2.1.6 — Recall and use a simple electron model to explain difference between conductors and insulators, giving examples

Supplement

• 4.2.1.7 — State that charge is measured in coulombs
• 4.2.1.8 — Describe an electric field as a region where an electric charge experiences a force
• 4.2.1.9 — State that direction of the electric field is the direction of the force on a positive test charge
• 4.2.1.10 — Describe simple electric field patterns around point charges, charged spheres and parallel plates