The dielectric strength of air is 3.0 × 106 V/m. A parallel-plate air-capacitor has area 20 cm2 and plate separation 0.10 mm. Find the maximum rms voltage of an AC source which can be safely connected to this capacitor.
Given: Dielectric strength of air (E) = 3.0 × 106 V/m,
Area (A) =20 cm2 and separation width (d) = 0.10 mm.
Potential difference (V) across the capacitor is
The maximum rms voltage of an AC source which can be safely connected to this capacitor will be given as
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