OpenStax University Physics/E&M/Electric Potential

(Vol. 2):    5:Electric Charges and Fields    6:Gauss's Law    7:Electric Potential    8:Capacitance    9:Current and Resistance    10:Direct-Current Circuits    11:Magnetic Forces and Fields    12:Sources of Magnetic Fields    13:Electromagnetic Induction    14:Inductance    15:Alternating-Current Circuits    16:Electromagnetic Waves

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Chapter 7Edit

Electric PotentialEdit

Electric potential  . Change in potential energy  

▭  Electron (proton) mass = 9.11×10−31kg (1.67× 10−27kg). Electron volt: 1 eV = 1.602×10−19J
▭  Near an isolated point charge   where   =8.99×109 N·m/C2 is the Coulomb constant.
▭ Work done to assemble N particles  
▭ Electric potential due to N charges.  . For continuous charge  . For a dipole,  .
▭ Electric field as gradient of potential   ▭ Del operatornote: Cartesian  Cylindrical  Spherical  


For quiz at QB/d_cp2.7Edit

  = electric potential

 

  = change in potential energy (or simply  )

 

Electron (proton) mass = 9.11×10−31kg (1.67× 10−27kg). Elementary charge = e = 1.602×10−19C.

 =kinetic energy. 1 eV = 1.602×10−19J

  near isolated point charge

Many charges:  .