Current, resistance and potential difference (AQA GCSE Physics Combined Science): Flashcards

How hard it is for electricity to flow

Ohms ($\Omega$)

Rheostat

Current directly proportional to potential difference

$V = I \times R$

Potential difference (voltage) in volts

Current in amps

Resistance in ohms

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

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

Follow Ohm's law, constant resistance at constant temp

Don't follow Ohm's law, resistance changes

Metal wires at constant temp, fixed resistors

Straight line through origin

Lower resistance