if the presence of electricity can be made visible in any part of the circuit, I see no reason why intelligence may not be transmitted instantaneously by electricity. what does this qute mean

Intelligence can't be transferred, it can be gained through knowledge.

Explanation:

This quotes means that intelligence can't be transferred from one material to another through any tools such as electricity. it can be gained through knowledge and research. Intelligence refers to the ability to acquire and apply knowledge and skills in our daily activities so intelligence can be gained from getting knowledge and skill through continuous struggle and determination.

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 .