Electricity
Definitions: Electricity
Exam question
Define electric potential difference across a component.
9702/22 · May/Jun 2025 · Q6(a)
Model answer
The energy transferred to the component per unit charge passing through it.
Exam question
Define resistance.
9702/23 · Oct/Nov 2024 · Q6(a)
Model answer
The potential difference across a component divided by the current through it.
Exam question
Define the ohm.
9702/22 · May/Jun 2021 · Q5(a)
Model answer
One ohm is one volt per ampere.
Exam question
Define the volt.
9702/23 · May/Jun 2020 · Q5(a)
Model answer
One volt is one joule per coulomb.
Exam question
State Ohm’s law.
9702/23 · Oct/Nov 2023 · Q7(a)
Model answer
The current through a conductor is directly proportional to the potential difference across it, provided that its temperature remains constant.
