Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) · 4.3.3

Action and use of circuit components Flashcards – Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028)

Revise Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) specification point 4.3.3, Action and use of circuit components, with free active-recall flashcards. Flip through the set or review every question and answer below.

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Cards in this set (5)

What equation relates potential difference $V$ , current $I$ and resistance $R$ ?

$V = IR$

How does potential difference vary with resistance when current is constant?

It is directly proportional to resistance: greater resistance requires a greater potential difference.

What unit is potential difference measured in?

Volts (V).

What unit is electric current measured in?

Amperes (A).

What unit is resistance measured in?

Ohms ( $\Omega$ ).