Question

While defining electrostatic potential energy why do we bring the unit test charge from infinity to refference point

Answer 1

we considered it cmg frm infintely bcz fr making it general as potential is inversely propotional to r so when r increases potential decreases
so for a specific length more than r potential will be too low so a distance beyond 10m wont have much potential
tats why we consider taking frm infinity as reference pt