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  1. Jun 2020
  2. phys.libretexts.org phys.libretexts.org
    5.6: Calculating Electric Fields of Charge Distributions
    3
    1. QingweiCheng 25 Jun 2020
      cosθ=z(r′2+z2)1/2.

      Unit Vector of direction 'Z'

    2. QingweiCheng 25 Jun 2020
      zz2+R2−−−−−−√z

      This is finding the Unit Vector of Z direction

    3. QingweiCheng 25 Jun 2020
      2

      This '2' here is the multiple factor that represent both K direction E-fields form left and right segment of the line charge due to symmetry, and it is why you don't need to integrate from -L/2 to L/2

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    phys.libretexts.org/Bookshelves/University_Physics/Book:_University_Physics_(OpenStax)/Map:_University_Physics_II_-_Thermodynamics,_Electricity,_and_Magnetism_(OpenStax)/05:_Electric_Charges_and_Fields/5.06:_Calculating_Electric_Fields_of_Charge_Distributions