AQA GCSE Physics - Electricity

Flashcards covering key concepts from the AQA GCSE Physics topic on Electricity.

For charge to flow, the circuit must be and there must be a source of .

closed; potential difference

The equation Q = I × t represents the relationship between __, __, and __.

charge; current; time

The resistance of a component affects the __ for a given potential difference.

current

In a series circuit, the total resistance is the __ of the resistances of each component.

sum

In parallel circuits, total current at a junction is equal to __.

the sum of currents in each branch

Mains electricity in the UK is an supply with a frequency of Hz.

AC; 50

A __ allows current to flow freely in one direction only.

diode

Power is directly proportional to current and __.

voltage

The National Grid transfers electrical power using and .

cables; transformers

Electrons in an insulator are __, preventing them from conducting electricity.

fixed

Sparking occurs when enough charge builds up and the objects are close but not __.

touching

Electric fields point in the direction a __ charge would move.

positive