Physics A-Level
Resistance
What Resistance means in Physics A-Level, as defined for OCR.
Definition of Resistance
Check what you remember
Read the wording for your board, then hide it and explain Resistance in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Measures how difficult it is for current to flow through a component, defined by R = V/I, where V is the potential difference across the component and I is the current through it.
Topics that use Resistance
- Resistance (OCR A-Level)
Related terms
- Circuit design for measurement
- Component protection
- Current–voltage characteristics
- Data logging and graphing
- Forward and reverse bias
- Graph interpretation
- Light intensity as a variable
- Non-ohmic behaviour
Using Resistance in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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