It is experimentally observed that if an insulator is used as medium in place of air or vacuum, the force between the electric charges is reduced by a factor "Er".
As air is replaced by some other medium with relative permittivity epsilon r, then force between the charges will be reduced by epsilon r. If F is the original force then new force will be F/ epsilon r
Q refers to charges. Charges are measured in coulombs.
Coulumbs law is applicable only for static fields that is when charges are stationary
The force between two charged particles.
newtons gravitational law is similar to that of coulomb's law...
Both are 'Inverse square' forces, f=k/r2 .
Limitations of coulombs law
No
Newtons law has to due with mass and ATTRACTION only Coulombs law has to due with charge and ATTRACTION AND REPULSION
coulombs law
Q refers to charges. Charges are measured in coulombs.
Coulumbs law is applicable only for static fields that is when charges are stationary
The force between two charged particles.
newtons gravitational law is similar to that of coulomb's law...
yes
Both are 'Inverse square' forces, f=k/r2 .
medium
The law is:Needed electricity in coulombs = Faraday constant (96500 C) x number of molesSo 96500 coulombs are needed.