Answer
Verified
426.3k+ views
Hint: Polar dielectrics are dielectrics which are made of polar molecules and have zero dipole moment when electric field is zero and non-polar dielectrics are dielectrics which are made of non-polar molecules but have non-zero dipole moment when electric field is zero.
Complete answer:
Dielectrics are materials that are non-conducting but transmit electric effect or electric force, they have no free electrons which travel through the material and thus, they do not carry current like metals.
The diagram below shows polar and non-polar dielectrics when electric field applied is equal to zero ($E=0$ ) and when electric field applied is not equal to zero ($E\ne 0$).
The two types of dielectrics are described as follows,
1. Non-polar dielectrics: In this case of dielectrics the center of the positive and negative charges coincides with each other. They consist of nonpolar molecules, whose dipole moment is zero. When a non-zero electric field is applied all the molecules in the non-polar dielectric align themselves in the direction of the applied electric field. Example of a non-polar dielectric is methane.
2. Polar dielectrics: In this case of dielectrics the center of the positive and negative charges does not coincide with each other, i.e. they have an irregular shape. They consist of polar molecules, whose dipole moment is never zero. When a non-zero electric field is applied all the molecules in the polar dielectric almost align itself in the direction of the applied electric field. Example of a polar dielectric is water.
Dielectric constant: It is a quantity that gives the measure of the ability of a substance to store electrical energy when placed in an electric field. It is also called relative permittivity of a substance and is given by,
$\kappa =\dfrac{\in }{{{\in }_{0}}}$ ….(i)
Where, $\in $ is the permittivity of the substance and ${{\in }_{0}}$is the permittivity of vacuum.
Thus, equation (i) gives the mathematical expression of dielectric constant or relative permittivity of a substance.
Note:
The behavior of polar and non polar dielectrics when placed in an electric field is what is used to differentiate polar dielectrics from non-polar dielectrics and thus should be remembered. Dielectrics are used in many applications such as capacitors and semiconductors.
Complete answer:
Dielectrics are materials that are non-conducting but transmit electric effect or electric force, they have no free electrons which travel through the material and thus, they do not carry current like metals.
The diagram below shows polar and non-polar dielectrics when electric field applied is equal to zero ($E=0$ ) and when electric field applied is not equal to zero ($E\ne 0$).
The two types of dielectrics are described as follows,
1. Non-polar dielectrics: In this case of dielectrics the center of the positive and negative charges coincides with each other. They consist of nonpolar molecules, whose dipole moment is zero. When a non-zero electric field is applied all the molecules in the non-polar dielectric align themselves in the direction of the applied electric field. Example of a non-polar dielectric is methane.
2. Polar dielectrics: In this case of dielectrics the center of the positive and negative charges does not coincide with each other, i.e. they have an irregular shape. They consist of polar molecules, whose dipole moment is never zero. When a non-zero electric field is applied all the molecules in the polar dielectric almost align itself in the direction of the applied electric field. Example of a polar dielectric is water.
Dielectric constant: It is a quantity that gives the measure of the ability of a substance to store electrical energy when placed in an electric field. It is also called relative permittivity of a substance and is given by,
$\kappa =\dfrac{\in }{{{\in }_{0}}}$ ….(i)
Where, $\in $ is the permittivity of the substance and ${{\in }_{0}}$is the permittivity of vacuum.
Thus, equation (i) gives the mathematical expression of dielectric constant or relative permittivity of a substance.
Note:
The behavior of polar and non polar dielectrics when placed in an electric field is what is used to differentiate polar dielectrics from non-polar dielectrics and thus should be remembered. Dielectrics are used in many applications such as capacitors and semiconductors.
Recently Updated Pages
Identify the feminine gender noun from the given sentence class 10 english CBSE
Your club organized a blood donation camp in your city class 10 english CBSE
Choose the correct meaning of the idiomphrase from class 10 english CBSE
Identify the neuter gender noun from the given sentence class 10 english CBSE
Choose the word which best expresses the meaning of class 10 english CBSE
Choose the word which is closest to the opposite in class 10 english CBSE
Trending doubts
Which are the Top 10 Largest Countries of the World?
How do you graph the function fx 4x class 9 maths CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Kaziranga National Park is famous for A Lion B Tiger class 10 social science CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
Write a letter to the principal requesting him to grant class 10 english CBSE