Physics A-Level
Derived units
What Derived units means in Physics A-Level, as defined for OCR.
Definitions of Derived units
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Reference: OCR
Units such as the newton (N) or joule (J) that are combinations of base units and are equally valid in calculations.
Units with special names, such as N, J, W, Pa, C, V, Ω, F, T and H, which can be expressed in terms of base units.
Combinations of S.I. base units, which may have special names but can always be broken down into base units.
The coulomb is a derived unit, defined in terms of the ampere and the second.
Topics that use Derived units
- Charge (OCR A-Level)
- Physical quantities (OCR A-Level)
- S.I. units (OCR A-Level)
Related terms
- S.I. base units
- Avogadro constant
- Base units
- Calculations with integer multiples of e
- Consistency of sign conventions in circuit analysis
- Conventional current
- Dimensional analysis
- Discrete nature of charge
Using Derived units in the exam
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