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- Difference between dielectric constant and dielectric function
The dielectric constant is a measure of the spring constant A material with a large dielectric constant is made of "stretchy" atoms or molecules Given a parallel plate capacitor, the capacitance depends on the distance between the plates Inserting a dielectric effectively adds plates, reducing the separation
- What is the difference between a dielectric and a semiconductor?
$\begingroup$ For an ideal dielectric, yes you can apply any voltage you want and it will remain an insulator Of course no real material is an ideal dielectric Real dielectrics “break down” (become conductors) at high enough voltages A natural example is air breaking down which causes lightning $\endgroup$ –
- How can capacitance exist if a vacuum is used as a dielectric?
With no dielectric material (only vacuum) between the plates, the capacitor is actually easier to explain: Attach a voltage source (i e , battery) to the capacitor Negative charges from the negative pole will move, due to the repulsion from the pole, towards the connected plate, making it more negative
- Breakdown voltage of a dielectric - Physics Stack Exchange
Breakdowns are electron cascades There are different kinds: 1) Intrinsic breakdown of the material occurs when the electric field is sufficiently strong to ionize an atom of the dielectric (or accelerate a stray electron sufficiently to do the same), with the resultant new free electrons then being accelerated by the field to repeat the process with another atom
- Is there any relation between dielectric constant of material and its . . .
For conductors dielectric constant is infinite as electric field cant exist inside it And conductors have very low resistance too So is there any relation btw dielectric constant and resistance of material
- 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
- What is the dielectric constant of a pure conductor?
Dielectric constant is proportional to the ratio of polarization density (P) and electric field (E) which means dielectric constant is inversely proportional to electric field The Electric field (E) inside a conductor is always zero under the static situation so the dielectric constant for conductor is infinite
- electromagnetism - Dielectric constant or permittivity of metals . . .
In other words, permittivity is a measure of how an electric field affects, and is affected by, a dielectric medium Yes, metals have infinite permittivity as they completely negate the electric field inside their bulk I e infinite resistance to setting up of field and hence infinite permittivity
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