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A parallel plate capacitor of capacitance C without dielectric slabs as shown inthe figure .then the new capacitance of capacitor is?
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A parallel plate capacitor of capacitance C without dielectric slabs a...
Understanding Capacitance of Parallel Plate Capacitors
In a parallel plate capacitor, the capacitance (C) is primarily determined by the area of the plates (A), the distance between them (d), and the permittivity of the medium between the plates (ε).
Capacitance Formula
- The formula for capacitance without any dielectric is given by:
- C = ε₀ * (A/d)
Where:
- ε₀ = Permittivity of free space (approximately 8.85 x 10^-12 F/m)
Effect of Introducing a Dielectric
When a dielectric material is introduced between the plates, the capacitance changes. The new capacitance (C') can be expressed as:
- C' = κ * C
Where:
- κ = Dielectric constant of the material (which is greater than 1)
- C = Original capacitance without the dielectric
Capacitance with Dielectric Material
- If the dielectric slab completely fills the space between the plates:
- The new capacitance increases as the dielectric constant enhances the effective permittivity.
- If the dielectric slab partially fills the space:
- The overall capacitance will be calculated based on the combination of the dielectric and the air gap.
Summary
- The introduction of a dielectric increases the capacitance of a parallel plate capacitor.
- The new capacitance can be significantly greater than the original capacitance, depending on the dielectric's properties.
- For precise calculations, consider the geometry of the capacitor and the properties of the dielectric material.
This understanding helps in designing capacitors for various electrical applications, optimizing their performance in circuits.
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A parallel plate capacitor of capacitance C without dielectric slabs as shown inthe figure .then the new capacitance of capacitor is?
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