Electric Circuits (Grade 12 NSC Matric Physical Sciences): Flashcards

Total potential difference when no current flows

Resistance within the battery itself

Actual potential difference when current flows

External resistance in the circuit

$\varepsilon = V + Ir$

$V = \varepsilon - Ir$

Terminal voltage is always less than EMF

$I_c = \frac{\varepsilon}{r}$

EMF ($\varepsilon$)

Negative internal resistance ($-r$)