P3

• Scalar quantity


  Quantity whose value may be represented by a single positive or negative real number. Characterized by its magnitude
• Vector quantity

  Has both a magnitude and a direction
• Field

  A region in which a particular physical function has a value at each and every point in that region
• Scalar field

  Function that gives a single value of some variable for every point in space
• Vector field

  A regions specified and defined by a vector quantity
• Vector scaling

  1. A positive scalar quantity is multiplied the direction of the vector remains the same

  2. If scalar quantity to be multiplied is negative the direction of the vector will change
• Vector addition

  To add vectors they should be on the same plane or which are called coplanar vectors
• Vector components

  • 2d vectors - cartesian plane
  • 3d vectors - rectangular, cylindrical, spherical
• Unit vector

  Component vectors have magnitude that depend on the given vector but they each a known and constant direction. Magnitude of unit vector is |a|=1
• Distance vector

  Simply act vector made by connecting two distinct points
• Electromagnetic field

  Electric field produce stationary charges. Magnetic field produced by moving charges
• Electromagnetic

  Study of electric field and magnetic field
• Coulomb's law

  Related to the force exerted between two point charges which place near each other. Charge can be positive or negative. 1c = 6 * 10 ^ 18 electrons
• Permittivity

  Ability to allow the material to flow
• Electrostatic

  Science related to the electric charges which are statics sample are at rest. Study of forces between charges
• Static electric field

  Electric field produce due to stationary electric charge does not vary with time
• Electric field

  All charges particles generate electric field "area of force surrounding charges"
• Electric field line rules

  • Start on positive charges and stop on negative charges
  • More charges more field lines
  • Field lines never cross
  • Field line spacing indicates field strength
  • Direction of E is tangent to the field line
• Electric field intensity

  Measured by the unit newton per coulomb or volts per meter
• Types of charge distribution

  • Line charge - particles uniformly distributed along a line, charge per unit length
  • Surface charge - charge particle distributed over a two dimensional surface
  • Volume charge - particles distributed in a volume
• Colonel Charles Coulomb