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- Why does the capacitance of a parallel plate capacitor increase on . . .
With a dielectric present due to the induced charge (called polarisation) the electric field within the dielectric is reduced but unlike a conductor does not become zero but a similar analysis will show that the charge on the plates of the capacitor must increase to keep the potential difference between the plates constant
- What are the conditions under which these equations hold for dielectric . . .
These equations seem to hold in most cases, but there are exceptions (e g , a dielectric sphere uniformly polarized in a uniform electric field) My textbook tells me that these expressions hold under certain conditions, but it is not clear about the conditions
- What is the dielectric constant of a pure conductor?
Dielectric constant is the ratio of permittivity of a medium to the permittivity of free space How to find dielectric constant of a conductor?
- electromagnetism - Dielectric constant or permittivity of metals . . .
I'm wondering what the dielectric constant or permittivity of metals is --particularly copper Do metals have an infinite permittivity?
- electrostatics - Why is capacitance increased with a dielectric rather . . .
A dielectric with high permittivity $\varepsilon$ permits (requires) more polarization for a given field magnitude than a low permittivity one More polarization means more charge stored, so the high $\varepsilon$ material must hold more charge for a given field to be measured across it when used as a dielectric in a capacitor
- Displacement current in a dielectric - Physics Stack Exchange
Further, this would imply that the equation for net displacement current in a dielectric medium would be $\epsilon_ok \frac {d\phi_E} {dt}$ However, this result doesn't make intuitive sense to me Could someone please explain if there's a problem with my thinking here?
- Conductor-Dielectric Boundary Conditions - Physics Stack Exchange
2 We have a conductor of resistivity $\rho$ and has a boundary with a dielectric of permittivity $\epsilon$ and we have displacement vector $\vec D$ at an angle $\alpha$ with normal to the boundary and directed from conductor to the dielectric I need to find the conductor's surface charge density and current density in the vicinity of the
- Can someone tell me why there are two values for the dielectric . . .
The relative permeability (or dielectric constant) is a complex number, in this case given by $\epsilon = \epsilon_1 + i\epsilon_2$, related to n and k by: $\epsilon = (n+ik)^2$ Separating real and imaginary parts, it leads to: $\epsilon_1 = n^2 - k^2$, and $\epsilon_2 = 2nk$ You can check those numbers easily to see it matches the data given by the website
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