Consider what you have learned in your astronomy class and this article about physical processes. What types of processes can emit gamma-rays?

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 .

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

does anyone know or what?