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Natural Sciences · Intermediate

Electric Charge & Fields

Rub a balloon on your hair and you're doing electrostatics. Learn how charges push and pull, how strong those forces are (Coulomb's law), how to picture them with electric field lines, what voltage really means, how fields from many charges combine, and how Millikan measured the charge of a single electron.

7 lessons~35 min0/7 complete
1

Charge and Force

Attraction, repulsion and Coulomb’s law.

  1. Static ElectricityPlus, minus, attract, repel
  2. Coulomb’s LawHow strong the force is
2

Fields and Voltage

Picturing forces in space.

  1. Electric FieldsField lines
  2. Voltage & CapacitorsEnergy per charge, stored charge
3

Combining and Measuring Charge

Superposition and the charge of the electron.

  1. SuperpositionFields add up
  2. Millikan’s Oil DropMeasuring the charge of one electron
  3. Sharp Points & Lightning RodsWhere charge crowds together