- #1
gralla55
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If you have an infinite non-conducting plate, the electric field just outside is equal to sigma / 2*epsilon.
The electric field just outside a conductor is equal to sigma / epsilon.
I understand both these results, but why is it than in the formula for the capacitance of a parallel plate capacitor, they use sigma / 2 * epsilon for the electric field contribution from each plate? The plates are metal, so I would think the formula for the electric field between them would use the result for conductors!
The electric field just outside a conductor is equal to sigma / epsilon.
I understand both these results, but why is it than in the formula for the capacitance of a parallel plate capacitor, they use sigma / 2 * epsilon for the electric field contribution from each plate? The plates are metal, so I would think the formula for the electric field between them would use the result for conductors!