Core practical: Electrical circuits (Edexcel GCSE Physics): Flashcards

Series

Parallel

$R = \frac{V}{I}$

Ohms ($\Omega$)

$R_{\text{total}} = R_1 + R_2$

20 $\Omega$

$\frac{1}{R_{\text{total}}} = \frac{1}{R_1} + \frac{1}{R_2}$

5 $\Omega$

Less than either resistor

One path for electrons to flow

Current has multiple paths

Increases with temperature

Set up circuit before closing switch