What is dielectric ? Explain the effect of introducing a dielectric slab between the plates of parallel plate capacitor.
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Dielectrics are non-conducting substanceswhich are the insulating materials and are bad conductor of electric current.Dielectric materials can be made to hold an electrostatic charge while dissipating minimal energy in the form of heat. Examples of Dielectric are Mica, Plastics, Glass, Porcelain and Various Metal Oxides and even dry air is also example of dielectric.

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Effect of Dielectric on Capacitance
Effect of Dielectric on Capacitance
Table of Content
What is Dielectric?
What is Dielectric Constant?
Effect of Dielectric on Capacitance
How dielectric increase the capacitance of capacitor?
Dielectric Polarisation
Inserting dielectric in Capacitor
Effect of dielectric on plates when voltage or charge is held constant
What does a dielectric do to a capacitor?
Adding Dielectric to a Capacitor
Capacitance of Parallel Plate Capacitor
Capacitance of Parallel Plate Capacitor when dielectric slab is placed
Capacitance in the presence of Dielectric
What is Dielectric?
Dielectrics are non-conducting substanceswhich are the insulating materials and are bad conductor of electric current.Dielectric materials can be made to hold an electrostatic charge while dissipating minimal energy in the form of heat. Examples of Dielectric are Mica, Plastics, Glass, Porcelain and Various Metal Oxides and even dry air is also example of dielectric.

Figure 1.1 Dielectric capacitor
What is Dielectric Constant?
In parallel plate capacitor, when dielectric slab is placed between the two plates then the ratio of the applied electric field strength to the strength of the reduced value of electric field capacitor is called dielectric constant that is:
K = Eo/E
K is dielectric constant
E0 is greater then or equal to E
Where Eo is dielectric
And E is net field
The larger the dielectric constant, the more charge can be stored. Completely filling the space between capacitor plates with a dielectric increases the capacitance by a factor of the dielectric constant:
C = KCo, where Co is the capacitance with no dielectric between the plates.
Effect of Dielectric on Capacitance
Dielectrics are usually placed between the two plates of parallel plate capacitors. They can fully occupy the region between the plates or can partially occupy.
When dielectric is placed between the two plates of parallel plate capacitor, it is polarized by the electric field present. The surface charge densities are considered as σp and – σp.
When the dielectric is fully placed between the two plates of capacitor then it’s dielectric constant increases from it’s vacuum value.

0
Home
»
Study Material
»
IIT JEE Physics
»
Electrostatics
»
Effect of Dielectric on Capacitance
Effect of Dielectric on Capacitance
Table of Content
What is Dielectric?
What is Dielectric Constant?
Effect of Dielectric on Capacitance
How dielectric increase the capacitance of capacitor?
Dielectric Polarisation
Inserting dielectric in Capacitor
Effect of dielectric on plates when voltage or charge is held constant
What does a dielectric do to a capacitor?
Adding Dielectric to a Capacitor
Capacitance of Parallel Plate Capacitor
Capacitance of Parallel Plate Capacitor when dielectric slab is placed
Capacitance in the presence of Dielectric
What is Dielectric?
Dielectrics are non-conducting substanceswhich are the insulating materials and are bad conductor of electric current.Dielectric materials can be made to hold an electrostatic charge while dissipating minimal energy in the form of heat. Examples of Dielectric are Mica, Plastics, Glass, Porcelain and Various Metal Oxides and even dry air is also example of dielectric.

Figure 1.1 Dielectric capacitor
What is Dielectric Constant?
In parallel plate capacitor, when dielectric slab is placed between the two plates then the ratio of the applied electric field strength to the strength of the reduced value of electric field capacitor is called dielectric constant that is:
K = Eo/E
K is dielectric constant
E0 is greater then or equal to E
Where Eo is dielectric
And E is net field
The larger the dielectric constant, the more charge can be stored. Completely filling the space between capacitor plates with a dielectric increases the capacitance by a factor of the dielectric constant:
C = KCo, where Co is the capacitance with no dielectric between the plates.
Effect of Dielectric on Capacitance
Dielectrics are usually placed between the two plates of parallel plate capacitors. They can fully occupy the region between the plates or can partially occupy.
When dielectric is placed between the two plates of parallel plate capacitor, it is polarized by the electric field present. The surface charge densities are considered as σp and – σp.
When the dielectric is fully placed between the two plates of capacitor then it’s dielectric constant increases from it’s vacuum value.
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dielectric are those substances of things which can have charge when the placed near any charged body but they cannot act as any conductor eg paper or even glass slabs which generally show charge .. dielectric slab increases the charge storimg ability and capacity of capacitor (mpst important question for all exams )
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