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Electric Fields

Cambridge A Level Physics (9702) · 6 topics

Electric fields and field lines

Origins of Static Electricity About 2600 years ago, Thales of Miletus discovered that rubbing amber with fur allowed it to attract feathers. This is charging by…
Uniform electric fields

Field Between Parallel Plates A uniform electric field is created by two parallel metal plates with a potential difference (V or Δ V) across them. The field…
Electric force between point charges

Coulomb's Law Charles-Augustin de Coulomb established that the force F between two point charges (Q_1 and Q_2) varies with their separation r following an…
Electric field of a point charge

Field Strength Formula The electric field E at a distance r from a point charge Q is determined by substituting Coulomb's law into the definition E = F/q. E =…
Electric potential

Electric Potential (V) Electric potential at a point is the work done per unit positive charge in bringing a small test charge from infinity to that point. It…
Comparing electric fields with gravitational fields

Similarities and Differences Both electric and gravitational fields describe how objects with certain properties (charge or mass) interact across space without…