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## Main Question or Discussion Point

Since:

[tex]R = \rho \frac{\ell}{A}[/tex]

When calculating resistance in a circuit and lets say there are no resistors in the circuit, does [tex]\ell[/tex] represent the length of the entire circuit (e.g. the length of the entire wire) or only the length across the battery?

[tex]R = \rho \frac{\ell}{A}[/tex]

When calculating resistance in a circuit and lets say there are no resistors in the circuit, does [tex]\ell[/tex] represent the length of the entire circuit (e.g. the length of the entire wire) or only the length across the battery?