Energy stored in the gravitational field of interacting bodies is

Answer : Gravitational potential energy

Explanation :

Gravitational potential is defined as the work done in moving an object from a fixed reference location to the location of object.  This arises from the law of gravity and it acts against the gravity.

Mathematically, it is defined as potential energy (U) per unit mass (m).

i.e.

The general form of Gravitational energy is

where, is gravitational constant

and are masses of interacting bodies

and is the distance between them.

Negative sign shows here that the system is bound.

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 .

a and b sometimes have a positive value