- #1

pranav p v

- 29

- 3

I have a doubt about coulomb's force equation in free space..ie 1/4πε0... Actually coulomb found that force exerted b/w charges are directly proportional to the product of charges and inversely proportional to the sqr of the distance bw them.we can measure force exerted and distance of separation but that was the first time to quantify how much charges are there...so we can choose any value to that charges..by taking proprtionality constant as 1 we can write the equation as f= q1q2/r²..so 1 unit of charge can be defined as amount of similar 2 charges when they are separated by 1 unit exerted 1 unit of force..

but inorder to simplify gauss's law equation we can put proportionality constant as 1/4π and also we can define 1 unit of charge accordingly..

but why we include 1/ε0 term in the equation..i know that force will be different for different medium of separation..so we can include a term which have different values for different material ( relative Permittivity)... My question is why don't we chose ε0 as 1 ?(εr can be included but why we choose ε0 as strange value) .give the answer please...

but inorder to simplify gauss's law equation we can put proportionality constant as 1/4π and also we can define 1 unit of charge accordingly..

but why we include 1/ε0 term in the equation..i know that force will be different for different medium of separation..so we can include a term which have different values for different material ( relative Permittivity)... My question is why don't we chose ε0 as 1 ?(εr can be included but why we choose ε0 as strange value) .give the answer please...

Last edited: