Q8.1 How energy travels in a simple battery & lamp circuit:
CORE CONCEPTS:
An electric circuit is like a duct for electrical energy, but this duct has no walls.
Generators don't produce 'electricity', they produce 'electrical energy' which is made of invisible fields resembling radio waves that whiz along outside of the wires. Generators are charge pumps. They force the charges found inside the wires to flow along.
The above topics have been explained in detail in earlier questions. This question focuses on more on the mysterious and theoretical side of the science of electricity.
The challenge of understanding, rather than satisfaction of explanation, is what drives most scientific advances: