Point and Spherical ChargesPoint and Spherical Charges

Fields are regions in which an object will experience a force at a distance (non-contact force). An electric field is created by charged objects. A uniformly charged sphere can be modelled can be modelled as a point charge at its centre. Electric field lines map electric field patterns. 

  1. The arrow shows the direction of the field (the direction in which a positive test charge would move if present)
  2. Always perpendicular to the surface of the conductor
  3. Equally spaced, parallel electric field lines represent a uniform field (one in which the electric field strength is the same everywhere)
  4. Closer electric field lines represent greater electric field strength

Electric field strength is given by the formula: E= frac{F}{Q}