ElectricityAQA GCSE Physics (8463)

Current, Potential Difference and Resistance

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

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1
Which symbol represents an ammeter?
Answer & explanation
Correct: option B
Ammeter = circle with A; voltmeter = circle with V.
2
Where must a voltmeter be connected?
Answer & explanation
Correct: option B
Voltmeters measure p.d. between two points — they go across (parallel to) the component.
3
How many cells are in a 'battery' as shown by AQA's circuit symbol?
Answer & explanation
Correct: option B
A battery is two or more cells joined together.
4
Which component allows current to flow in ONLY ONE direction?
Answer & explanation
Correct: option C
Diodes are one-way — current can only flow from anode to cathode.
5
An LDR's resistance changes with:
Answer & explanation
Correct: option C
LDR = light-dependent resistor. Higher light → lower resistance.
6
A thermistor's resistance changes with:
Answer & explanation
Correct: option B
Higher temperature → lower resistance for a typical NTC thermistor.