Physics A-Level
Permittivity of free space
What Permittivity of free space means in Physics A-Level, as defined for OCR.
Definition of Permittivity of free space
Check what you remember
Read the wording for your board, then hide it and explain Permittivity of free space in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
A quantity with the value 8.85 × 10⁻¹² F m⁻¹ that, together with the radius, fixes the capacitance of an isolated sphere in free space.
Topics that use Permittivity of free space
- Electric potential and energy (OCR A-Level)
Related terms
- Electric potential
- Geometry determining capacitance
- Graphical representation of force against distance
- Potential difference
- Sign convention for like and unlike charges
- Work done
- Work done as area under a force–distance graph
- Capacitance as charge per unit potential difference
Using Permittivity of free space in the exam
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