Question about resistance in a circuit

[skwz]

Main Question or Discussion Point

Since:
$$R = \rho \frac{\ell}{A}$$
When calculating resistance in a circuit and lets say there are no resistors in the circuit, does $$\ell$$ represent the length of the entire circuit (e.g. the length of the entire wire) or only the length across the battery?

 

[wudingbin]

it should be the length of entire wire

 

[KnowPhysics]

yes, l - length of the entire wire.