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obtain expression for force between plates of a charged parallel plate capacitor
Asked by bmahalik21 | 05 Mar, 2023, 08:23: PM
Electric field E near capacitor plate , E = σ / ( 2 εr εo )

where σ = Q/A  is surface charge density on capacitor plate. Q is total charge o plate and A is area.

εr is dielectric constant of material between capacitor plates. If capacitor plates are air filled ,then εr = 1

εo is permittivity of free space.

Hence electric field E becomes ,

Force F on charges of other plate , F= ( Q ×E )

Normally we do not measure , charge on capacitor plates .

We know the capacitance C of capacitors and applied electrical potential difference V across capacitor plates .

Q = C × V .

Hence force between capacitor plates becomes

Answered by Thiyagarajan K | 05 Mar, 2023, 10:12: PM

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