BRAINCAKEPermittivity of free Space - ε0
The electric field around an object is greater when the charge is more concentrated. The electric field strength E is proportional to the charge per unit area on the surface of a plate. The constant of proportionality ε0 is called the permittivity of free space and has the value 8.85×10-12Fm-1.
Q/A= ε0E
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Key terms in this lesson
- Electric field strength
- The electric force per unit charge acting on a small positive test charge placed at a point in an electric field.
More in Electric Fields
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- Electric Field between Two Parallel Plates
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- Equipotentials
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All 17 lessons in Electric Fields · All AQA A-level Physics topics