When we changed gravity on something, we changed two things. can the same idea be applied to electrical force? (the answer is yes) so what are they?

Here, the formula for gravity is,

g=GM/R^2

so, to change gravity, either we have to change mass(M) or radius(R) of the planet.

similarly, the formula for electrical force is,

F= kq1q2 / r^2

and to change the electrical force, either we have to change the magnitude of charge(q) or the distance between the two charges(r).

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

im sorry i dont know