statcoulomb  

Unit system  esucgs, Gaussian 
Unit of  electrical charge 
Symbol  statC or Fr, esu 
Conversions  
1 statC in ...  ... is equal to ... 
SI  10 × (c_{cgs})^{−1} C≈3.33564×10^{−10} C, where c_{cgs} = 2.99792458×10^{10} cm/s is the speed of light expressed in cgs unit. 
emucgs  (c_{cgs})^{−1} abC 
CGS base units  1 statC = cm^{3/2}⋅g^{1/2}⋅s^{−1} 
The statcoulomb (statC) or franklin (Fr) or electrostatic unit of charge (esu) is the physical unit for electrical charge used in the esucgs (centimetre–gram–second system of units) and Gaussian units. It is a derived unit given by
 1 statC = dyn^{1/2} cm = cm^{3/2} g^{1/2} s^{−1}.
It can be converted using
 1 newton = 10^{5} dyne
 1 cm = 10^{−2} m
The SI unit of charge is the coulomb (C). The conversion between C and statC is:
 1 C = 2997924580 statC ≈ 3.00×10^{9} statC
 1 statC ≈ 3.33564×10^{−10} C.
The number 2997924580 is 10 times the value of the speed of light expressed in meters/second or, in other words, the speed of light in decimeters per second.
YouTube Encyclopedic

1/3Views:571133 14810 585

✪ Unit of charges  #6 Electrostatics  ClassXII Physics  TPT RAMS  HINDI V1

✪ Coulomb's Law and Electric Fields.

✪ Quantisation of electric charge  Basic properties of electric charge
Transcription
Definition and relation to cgs base units
The statcoulomb is defined as follows: if two stationary objects each carry a charge of 1 statC and are 1 cm apart, they will electrically repel each other with a force of 1 dyne. This repulsion is governed by Coulomb's law, which in the Gaussiancgs system states:
where F is the force, q_{1} and q_{2} are the two charges, and r is the distance between the charges.
In SI units, the parallel statement for the force between two charges is:
where ε_{0} is the electric constant. The effect of the Gaussiancgs definition is to fold the "1/4πε_{0}" factor into the definition of the statcoulomb by setting it equal to unity in terms of length, mass, and time; which results in the Gaussian unit of electric charge possessing the cgs dimensions of L^{3/2} M^{1/2} T^{−1}.